The Sixvengers...! No wait... The Avengixers...! No no no, neither of those work, but with the quickly approaching release of Avengers: Infinity War, let’s take a look at each Sixer equivalent in the Marvel Universe...
Similarities include the ability to crush literally anything in front of them with their bare hands, and the ability to jump incredibly high in the air. When Richaun gets angry, he tends to dunk on anyone/anything that stands in his way. Only difference is that Richaun is seemingly stuck in Hulk mode forever, but maybe one game his heart rate will drop back to normal as he will transform in to a little nuclear physicist.