I think you do Stan a disservice if you equate him with Gasquet. Richard is a mental midget, and has serious technical and strategic issues that can be exploited (exaggerated take back, and court position). Stan doesn't have these issues. His problem has always been about lack of belief. I think that Delpo and Berdy are the correct comparisons.
Delpo is limited by injuries and not much else, when he's playing he believes in a way only the big 4 do, and he's fully capable of beating any one of them. If Delpo were to win another slam, I don't think anyone would be shocked. I would say however that since his first wrist injury his backhand has not been the point ender it could be. Does anyone remember the backhands he was firing at Roger at RG thee year Roger won? Some of those were absolutely terrifying.
Berdy has the equipment to beat anyone, even though his movement is a slight weakness it's improved tremendously in the last few years. He's able to take out the rest of the field relatively consistently these days, but still seems to lack belief or resolution at critical moments against the big guys.
As for Ferrer? I can't see it. He's a talent for sure, but I just don't think he has the ability to beat the top guys in a final. He's just not quite good enough. That said if he were to get there and somehow none of the big 4 are facing him, I would put serious money on him getting the W. His problem is his star quality opposition, so what are the odds that all 4 of them fail to get to a slam final?
As for Stan? He definitely has the ability to win a slam, he's done it once, and if the draw works for him he can definitely do it again. I think the issue for him, is that it's still taking him time to feel comfortable with his new shoes. It's not a great surprise to me that he failed here. It's too soon since his big win. If he had somehow managed to get to the 2nd week, I think he would have been a serious serious threat. The question is.. can Stan work through his issues and acquire the belief that he's truly worthy of what he already has? Winning Monte Carlo and beating Roger in a final is clear evidence that he can do, but it's going to take time getting used to being spoken of as a legitimate contender at Slams. Let's see what happens at Flushing. For what it's worth Australia next year might be tough for him, for exactly the same reasons as RG has been tough... but it might also inspire him. We just can't know