it sort of depends on how you specifically define morality, as pretentious as that sounds, because i have characters who have committed the most horrific attrocities but did it with ultimately very sympathetic reasons and then i have characters that don't reach that level of destruction but are at their core a lot more cruel

best is a bit easier, i would say it's. probably maya fey?

in terms of characters i've played in games it's probably either adaine or raven. i would lean more towards raven

simply because raven is a lot more concerned with being good and is constantly afraid of giving in to her demonic impulses, and instead chooses to be a hero at every turn. she very much thinks she's evil to the core but she's. wrong lmao.

circling back to worst... i would say it's prooooobably spike

not so much from the canon point i took him from but like, he spent a hundred years slaughtering entire towns and pillaging europe.

counting my entire muselist, peter lukas probably has him beat.