1. Walker Kessler
Kessler has been selected to USA Men’s National Team Player Pool, so it's not completely farfetched to suggest that he could represent the team in the near future.
Part of Team USA's dominance has been depending on big men who boast defensive excellence like Anthony Davis and Bam Adebayo. Kessler was among the most impressive rookie defenders in recent memory, so he'd fit their MO.
To be fair, he's coming off a disappointing sophomore campaign, but that's not too out of the ordinary. Especially for players who had sensational rookie seasons. If Kessler can prove that last season was an aberration and will only get better from here, he'd be an excellent rim protector to have on the team.