Intro to Cowboy Bebop

I don't know about "best," but my favorite is Gekkou Survive by Franchouchou from Zombieland Saga Revenge.

And definitely not "best" but one I just like - Sanki Tousen by Manias from Akiba's Trip: The Animation.

And potentially actually the best - the one to which so many others have aspired in later years - God Knows by ENOZ from The Melancholy of Suzumiya Haruhi.

• 微笑みの爆弾 from YuYu Hakusho

• It’s Gonna Rain from Samurai X

• Hero’s Come Back from Naruto

• The Real Folk Blues from Cowboy Bebop

• Time Left from Chainsaw Man

• Roundabout by Yes, JoJo’s Bizarre Adventure

• Prayer X from Banana Fish

• Jane Doe from Chainsaw Man

• On The Way from Dandadan

• SpecialZ from Juijutsu Kaisen

• il vento d’oro from JoJo’s Bizarre Adventure

• Motteke! Sailor Fuku from Lucky Star

And a bunch of Ado songs from the One Piece movie. I don’t watch One Piece but the Ado songs are amazing.

OPs and EDs? It's hard to choose, there are so many good ones.

Live songs? Yuru Yuri live events are peak seiyuu aidoru especially the first season OP and ED 😤

Insert songs? I really don't know off the top of my head!

Songs sung by characters? THAT one from ARIA (not spoiling it). And the songs from K-ON! (also written by them). I also liked the graduation song from Non Non Biyori.

BGM? ARIA and Hidamiri Sketch have some OST that have vocals and are thus songs technically. Most of them don't have lyrics but if we count it then I pick those.

Character songs? Probably more Yuru Yuri songs especially the live versions. Lucky Star has great ones especially those where they sing karaoke together.

I think I'm gonna go with the entire Hellsing 2001 soundtrack

Hellsing Ultimate is the better adaption of the manga, but Yasushi Ishii made something that transcends even that with these songs

Season 1 intro song for DanDaDan

JIBUN WOO SEKAI SAEMO

So many... Only counting inserts, OPs and EDs, here are some of my favourites:

• The AoT insert songs are incredible and this suite is even better.
• Grand Escape from Weathering With You
• Suzume's title track
• unravel, as cliche as it is
• Enigmatic Feeling from Psycho-Pass
• Signal from 91 Days
• Black Lagoon's OP
• The Garden of Sinners EDs
• Land of the Lustrous OP
• Watashi Dake Yurei (the SICKHACK song from BTR).
• Original Spice and Wolf openings
• Voracity by MYTH & ROID from overlord
• Hunting Soul from Dandadan
• Might be recency bias, but the OPs from With You In The Rain and Clevatess
• Fate/Stay Night Heaven's Feel EDs by Aimer

God Knows from haruhi, maybe motteke sailor fuku from lucky star too. Oh and also Duvet from serial experiments lain.

Witch from mercury outro from the second half of the series

Red:birthmark

https://youtu.be/O774SDZJ2QQ

For me, that’s tied with the FMA:brotherhood intro

Spice and Wolf - The Wolf Whistling Song

YouTube link

If you like Evangelion and jazz, I recommed The World! Evangelion Jazz Night Tokyo 3 Jazz Club and EVANGELION-VOX album.

In the context of the story arc, Hero Too from My Hero Academia. Not an objectively amazing song, but I like the various tie ins from the performance in the story. Turns out it was sung by Chrissy Costanza of Against the Current. I also like their 2016 album In Our Bones.

The opening for Watamote, I really like. The anime itself is pretty bad, though it was fun to drunkenly watch with a friend. - This

Tank! from Cowboy Bebop is one of my favorite classics, though really the entire Bebop OST could be on that list.

OP1 from Ranma 1/2 is a fun listen.

And every Creepy Nuts song in Call of the Night is an absolute banger.

ED1 - Yofukashi no Uta

OP1 - Daten

ED2 - Nemure

OP2 - Mirage

And several other insert songs. Easily some of my favorite anime music atm.

Amazing Grace