Del Potro is a very interesting case, but tall tennis players are definitely more favored by a lean build, and I think Del Potro is one of those guys that as he grew into his body, filled out too much. I think Roddick had a similar issue imo. His athletic peak was super early and after he filled out he just got slower.haha, my favorite topic again.
For me Del Potro, for that brief period of time (2009) before injuries *** him up, offered the best combination of otherworldly height, and strong tennis skills. Maybe Medvedev is similar today, hard to judge, but Del Potro at 2009 RG and then smashing past prime Fed and Nadal at the USO, is still the standard bearer.
Medvedev is definitely one of the best movers I've seen at 198, but technically I don't see it. His game has tremendous gatekeeper potential to me much more than Slam champ/#1 potential, but then again the 90s players are so bad as a group Med might as will win a huge amount.
The most ideal physique in tennis imo is still Gael Monfils but he's technically so much worse than the guys he's competing against he needs all of that physicality to make up for his weaknesses rather than winning Slams with it.