2012 Team USA. Easy.
Peak LeBron, beginning of prime Westbrook and Durant, latter prime Wade, post-Germany procedure Kobe, prime Chandler, Iggy, rookie AD.
You got the most athletic SF of All-Time, arguably the most athletic PG of All-Time next to Rose, two top 5 SG athletes in Kobe and Wade, Iguodala one of the most athletic swingmen of All-Time, KD one of the most unique and long athletes the game has seen, Tyson Chandler who set the precedent for the rebounding, rim protecting, lob catching athletic bigs of today. Young raw AD coming out of Kentucky, super long and wiry dunking and blocking everything. Even shifty ass Harden even back then one of the strongest 2's in the game, and CP3 who can turn the jets on and crafty around the rim. D-Will still had jets and used to catch sneaky posters.