Blob.
I don't think Rhino can really even hurt Blob, unless he gets creative and finds some way to block Blob's nostrils and mouth to suffocate him.
Maybe if he can find a way to use his horn to gouge Blob's eyes out and somehow pierce his brain? But I don't see Blob letting him get close enough to pull something like that off.
Originally posted by xXI_wing_IXx
Blob sits on Rhino's face
Even AoA Blob did it to Fantomex, with Deadpool warning about prostate misdirection. Fantomex's reaction after being freed by Famine was great.
Originally posted by StiltmanFTW
Ultimate Blob (well, Magician's construct, actually) sitting on Jean was funny, too.
Planet X Blob also gave a nice face-sitting session to Doom.
That What The...!? series Blob did it too, although he missed Spiderman's face in his rage. Not sure what that world is even called. Lol