With stuff like Geppou and Soru on super speed, because it's Garp, and something like Galaxy impact, Garp is very versatiled.
Imagine him fighting WB. It's difficult to get past those quakes, but Garp can speedblitz above his head and drop a nuke on him. Or if he fights against environmental awakening techs, he's easily outpacing it.
Garp would need 3 seconds for guys like all out Doffy and Katakuri with such a move combination.