best opening ?

attack on titan openings literally set me on fire

Op of id:invaded is one of the best in graphics for sure. But its hard to say what is the best in music. Unravel, the peggies - centimiter & kimi no sei, hikaru nara, and crying for rain are few of decent music in ops.

Idk if its the best but I like how Mushoku Tensei: Jobless Reincarnation does the openings by having a new scene for every episode which expands on the world and the characters actions for the day without saying a word.

Evangelion, both visually and music, I really appreciate

Ignite by Sword Art Online

Black Clover. The 3rd Opening.

Cowboy Beebop. Change my mind.

Be my Railgun from Toaru kagaku no railgun! that stuff bussin

New Genesis Evangelion for the win!

Almost all the songs by SPYAIR and DOES in gintama, JJBA ops , Unravel , FMAB OP 1,5 , Black clover op 10,13,14 , steins gate op , silhoutte , most of the one piece ops, HxH op , Psycho pass op 1 , AOT ops , Fate series BRAVESHINE , Fate zero OATH sign , Demon slayer op 1 , death note op 1 , Bleach op 13 ( the 13th of opening of any anime doesnt miss actually)