Yonkou
Kaidou - Was good. 8/10
Bigmam - wasted potential 3/10
Shanks - Bro appears once in a decade 5/10
BB - Only true pirate 7/10
Admirals
Akainu - he's strong but an asshole He genuinely makes me wanna hate him , Which is his Character so 10/10
Aokiji - Well written 9/10
Kizaru - umm his Archaeology move was well written but He isn't overkill like other admirals 8/10
Fujitora - probably the best balanced Admiral 8/10
Aramaki - an asshole as intended by oda 10/10.
Warlords
Mihawk - Probably the best written Warlord 10/10
Boa - again Her flashbacks and Current role is well written 10/10.
Doffy - I don't even need to explain 10/10
Crocodile - Absolute badass 10/10
Moria - Disgusting 2/10
Jimbe - prolly 7/10 , if sun pirates flashback is included 10/10
I won't add Weevil and Law here.
#2's
Zoro - bro is almost the second Protagonist 10/10
Kata - Best written in WCI 10/10
King - just onighishima 5/10 , when flashback included 8/10
Marco - no doubt 10/10
Benn - still want from him I can't rank him.
BB #2 - Similar situation as Benn
Law and Kidd pirates is pointless they are basically one man crew.
Rayleigh - Very relevent to the story 10/10
Sabo - I don't see him being imp tbh 6/10
Mihawk/Crocodile (cross guild) - 20/10.
I guess Warlords takes the win if moria isn't counted.
Then #2 and admirals ranks are debatable
Yonkoi crew is brought down by Bigmam alone.