Swarm vs Wolverine
Not really sure what either could do to the other. I mean Logan probably has to sleep at some point, so Swarm could pin his sleeping form for a sleeping ten-count, maybe...?
I suppose Wolverine could eventually kill every single bee in the swarm, but it will be a long, miserable fight for him. On the other hand, maybe Swarm could suffocate Wolverine by filling his mouth and throat with bees. Ugg.