Literally any of the Western Conf. teams could beat Cleveland. All the Western teams have good enough defense where they can at least slow down an overworked LBJ and hobbled Kyrie. And I think they're so much better offensively that they can actually capitalize off of a stagnant Cleveland offense.
Nope, the Clippers are just not built to beat the Cavs, they don't have the perimeter defenders to keep a team with perimeter players like the Cavs from scoring. Look at the damage Kawhi did vs them with Patty Mills essentially scoring whenever he wanted. The Warriors right now are looking so and if they have to play the Cavs it's Bron vs Barnes which is another mismatch, or they have to play Iguodala more minutes
The Grizz have the elite perimeter defenders with an elite defensive anchor, which is why I'd say they'd be too much for the Cavs/Bulls. The other squads are not some insurmountable problems, especially not with how they've looked in the playoffs.