iirc my 90's knowledge correctly Blade's vampirism is a variation/mutation of the normal vamp infection which categorized as falling as a unique mutation making him a mutant persay.
see this is when i regret not saving and storing scans..
anyways.....namor is a mutant same as blade just not the conventional type his mutation stems from the fact that he is half atlantean and human which is the reason for his strange powers that are not common something happen on the genetic lvl changed.
same as blade.. the only difference blade's mutation was caused by a virus his mutation was that he didnt undergo the full transformation when he was born.. the definition of dhampir is being loosey goosey with him..
now Wolverine has bn called a mutant various times that doesnt make him a mutant.. the marvel classification for a mutation is an aberration of the norm species and having the X-factor gene..
now many ppl are called mutants in comics when they are not and we the reader learned to accept it some times as just being an honorary title due to their power...
but if we want to get technical we know they are not.. you can call blade a dhampir all you want and it can be said in comics but at the end of the day he isnt nor does he even fit the actual definition of one.. he is unique different from even other dhampir hence his appeal and character history... but at the end of the day if we want to name real half human half vampires real dhampirs we dont include him anymore then we include Morbius or Bloodscream and even if we do we elaborate the difference among the other characters...
now back to wolverine he has bn an anomaly for decades even different from other mutants... early in his career he was allowed in the X-men even when he was recognized by the team as being different from even them and being billed as:
a biologically engineered mutant... a bionic Mutant...a para human, a homo sapian superior and mutant..
now before you go screaming see that means he is a mutant!
all these names were just shot in the dark trying to define and label Wolverine and nothing but half @$$ guesses only falling into them by the looses of terms even professor Cornelius and Hines were guessing at his pedigree.. that is what made wolverine different and unique making him even more so when Scans couldnt label Wolverine..
now with the retcon you got logan coming from a different species of hominid and being a hibred of the primate ancestral human species and a lupine humanoid species that interbred millennium ago creating the various Lupine off shoots of humanity from werewolves and feral mutants... which makes Wolverine complicated and is only being disingenuous when we choose to just call him a mutant b/c it makes things easier