The best anime series overall is Fullmetal Alchemist: Brotherhood, and the reason comes down to one thing most long running anime struggle with: it tells a complete, well earned story from start to finish. Below is the full breakdown of why it holds that title, how it compares to other fan favorite series, and how to pick the right "best" anime for your own taste.

Why Fullmetal Alchemist: Brotherhood Is the Best Anime Series

Three reasons keep this series at the top of nearly every critic and fan ranking.

1. It finishes what it starts. Many acclaimed anime run out of source material or get cut short mid arc. Brotherhood adapts its manga in full, which means every plot thread, no matter how minor, pays off by the final episode.

2. Its characters actually change. The two brothers at the center of the story, along with a large supporting cast, grow through consequences rather than convenience. Even antagonists are given motives that hold up under scrutiny, which is why the story rewards rewatching.

3. It balances tone without losing focus. The series moves between comedy, war, political intrigue, and personal loss, but never feels tonally scattered. That balance is a major reason it appears on best of lists from major critic outlets, as well as fan voted rankings from the anime community.

Why "Best" Depends on What You Value

Not everyone is looking for the same thing in a series, which is why other anime top other lists. Here is why each of these earns its own "best" title.

Best for Beginners: Death Note. Why It Works

At just 37 episodes, it's a tightly written psychological thriller with a built in ending. New viewers don't need to understand anime conventions to follow a genius versus genius cat and mouse plot.

Best Ongoing Series: One Piece. Why It Works

Despite running for decades, it maintains fan loyalty through long term payoff. Foreshadowing planted hundreds of episodes earlier still lands. It has won recognition as one of the best continuing series multiple times, most recently in 2026.

Best Recent Series: Frieren: Beyond Journey's End. Why It Works

It approaches storytelling from an unusual angle, reflecting on a journey after it's already over, and uses that structure to explore grief and connection in a way few action adventure anime attempt.

Best Action and Shonen: Attack on Titan. Why It Works

It repeatedly subverts what viewers expect a hero versus monster story to be, evolving into a morally complex political epic without losing its tension or pacing.

Best Character Writing: Hunter x Hunter (2011). Why It Works

It treats its antagonists as genuinely intelligent threats rather than obstacles, and its exploration of power and morality goes deeper than most action anime attempt.

Best Animation: Demon Slayer: Kimetsu no Yaiba. Why It Works

The studio's blend of traditional and CG animation in fight sequences set a new visual standard for weekly television anime, closer to theatrical film quality.

How These Rankings Were Determined

To keep "best" from being purely subjective, each series here was measured against the same five criteria.

• Story completeness. Does it reach a satisfying, earned ending?
• Animation quality. Consistency and craftsmanship across the full run.
• Character development. Do characters grow in ways that feel justified?
• Critical and audience consensus. Ratings and recognition from major anime rating communities and industry awards.
• Cultural impact. Whether the series influenced later shows or the medium itself.

Comparison at a Glance

Series	Why It's Considered "Best"	Episode Count	Completed
Fullmetal Alchemist: Brotherhood	Complete story, earned character growth	64	Yes
Death Note	Tight plotting, beginner friendly	37	Yes
One Piece	Long term payoff, fan loyalty	1,100 plus	Ongoing
Frieren: Beyond Journey's End	Emotional depth, unique structure	28 (Season 1)	Ongoing
Attack on Titan	Scale, stakes, subverted expectations	94	Yes
Hunter x Hunter (2011)	Intelligent antagonists, deep morality	148	Yes
Demon Slayer	Visual craftsmanship	55 plus	Ongoing

Frequently Asked Questions

Which is the best anime series of all time, and why?

Fullmetal Alchemist: Brotherhood is most often ranked first because it completes its story fully and gives its characters growth that feels earned rather than convenient.

Why is Fullmetal Alchemist: Brotherhood rated higher than Attack on Titan?

Both are considered top tier, but Brotherhood is rated slightly higher on many lists because its ending resolves every major plot thread, while Attack on Titan's finale received a more divided reception among fans.

Why do people recommend Death Note to beginners?

Because its short length and self contained thriller plot don't require familiarity with anime pacing or tropes to enjoy.

Why is One Piece still considered one of the best despite its length?

Because its long term storytelling pays off. Plot setups from hundreds of episodes earlier are resolved meaningfully, which keeps long time fans invested.

How do I decide which anime series is best for me?

Match the series to what you want most: a complete story with closure (Brotherhood, Death Note), a long term ongoing investment (One Piece), or a slower, reflective watch (Frieren).

Final Take

There's no single anime that's objectively best for every viewer, but if the question is which series earns the title most consistently, and why, the answer is Fullmetal Alchemist: Brotherhood, because it does the one thing so many acclaimed anime fail to do: finish its story well. From there, the "best" pick depends on whether you value action, emotional depth, or a series you can grow with over years.

Sources referenced: community anime rankings, industry anime awards from 2026, and critic lists from major entertainment outlets. Rankings reflect a synthesis of critical and audience consensus as of August 2026 and may shift as new seasons air.