fourth spider-man villain may just be Carnage because people love the edgy boy
and then obviously Morbius because he has his own feature film
and then Kraven, maybe? Theres a solid b tier with him, Sandman, Vulture, Electro, etc. sinister six types. But Kraven has the most famous individual storyline of any of these guys, which I think puts him a little above them.
For your
Azuarc
.
At least Kupo has class and doesn't MESSAGE the people
-Dr Pizza