I like Tsonga just as much as I like JMDP, and Soderling and Berdych are also among my favorite players. But none of them is a better player than Del Potro or has the same potential to achieve things in this era as Juan. It is no anomaly that JMDP has a Slam and those three haven't: he's simply capable of hitting with a kind of destructive power and metronomic consistency that those three aren't.
I actually Tsonga is more talented but he's not a better player because (a) he lost all his formative years due to injuries (explaining for instance his backhand woes) and (b) he was born a few years too late, his all-out attacking game wasn't made for homogenised surfaces..
GOAT response. You are like a politician!
But Murray is better than Del Potro.