I think it's worth shopping Vuc and seeing what you can get for him. If you could get, say, Jimmy Butler for him straight up, I'd do that. Kemba or Kyrie might be reasonable targets as well. Kemba's actually been kind of quiet lately, so you could even try making that a 2-for-2 where you win big on the second player.

If you wanted to go really big you could even try a 2 for 1 of Vuc plus someone else for Harden.

You didn't mention your league format, but if it's a H2H playoff league, that's even more of a reason to move Vuc, because the Magic have a 2 game week right in the middle of the fantasy playoffs.

As for Bam/Rob: one thing you could try is picking up Bam, and offering a trade to the Whiteside owner where you include him as the second guy in a 2 for 2 deal, pitching him as a handcuff. Because that's where Bam's greatest value is right now. Honestly though given how set you are on big men I wonder if you might actually be better off dropping Robinson for whoever the best guard on the wire is, or just streaming with that spot. He's a one-category player right now and it's a category that you already have well covered, so he's just not of much value to you. And he's a difficult guy to trade right now because I don't think anyone trusts he can stay on the floor.

Robinson is droppable in leagues where you can't just stash him... Bam is likely to disappear when Whiteside returns. Tough spot. Seems like you need some guards...