There are some I think started out as copies on both sides but never went thru. Like I think Stark had a similar look to Bruce, both were rich, had butlers, and used technology to fight crime. That's on the outside tho, while both hero's their personalities differed later on and origion, Stark a drunk, Bruce driven by vengence.
Same with IMO Wolverine and Lobo, and from what I understand Lobo is a Wolverine Parody anyway. Wolverine and Lobo both anti hero's (well not too sure on Lobo, know little about him, prob know more of him from JLA cartoon than comics lol), both healing factors (tho Lobo's is far more advanced, I know atleast as much about his blood and all), and so on. But of course far diff personalities with Wolverine's complicated past and battling the inner demon, and Lobo being a space alien doing I guess whatever the hell he feels like. I think Deadpool falls in that too, he was a Deathstroke rip off atleast in looks. Course that's def where it ends, love Deadpool lol.
Personality wise I'd say Cyke and Supes are close kinda. Throwing away Cyke having no need to hide his identity, both are boy scouts who have to hold back in fear of hurting others, ready to sacrifice themselves for others, and willing to put being a hero in front of their own lives even if it hurts. I almost would say Doom is closer to Darkseid than Thanos, but not quite sure, Doom seems to have more heart. Both have no prob putting fear into their subjects for obedience, both feel it's their destiny to be rulers too, which Apoc fits in that role as well. Thanos just wants in good with Death, cares nothing about being a ruler, he'll kill everyone if that's what it takes.
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Who are these counterparts -
Punisher
Nick Fury
Cable
Thor (and don't say supes, I mean in personality lol)
Human Torch
and like above would like to hear one to Juggernaut.