Rumble is clearly the best and most dominant striker currently in MMA

No-one comes even close. Just think about for a second what he has shown since coming back to the UFC:

A complete domination over then top5 ranked Phil Davis in a stand up fight. Davis manages to land 9 strikes to the head in 15 minutes.

Knocks out Nogueira in 44 seconds, Nogueira doesnt land a single strike.

Knocks out top2 ranked Gustafsson in 2min 15 seconds, Gus lands 8 strikes to the head.

Knocks down Cormier and completely dominates the stand up, Cormier barely lands anything...

Rumble is clearly the best and most dominant striker currently in MMA