I'm not sure you can argue "real life" possibilities here, sure you could get pushed off of the RKO, but there's no way most people could pull off a GTS either.
The RKO is definitely up there near the top, if not at the top. The GTS is a little inconsistent, as one or two others said, sometimes it's pretty obvious the knee makes no contact. Plus, it's a long setup, which could be good or bad, depending. The RKO is probably the most versatile finisher. It can be hit quickly out of nowhere, or can be set up with Orton's facial distortions and mat-pounding. It can be done on anyone of any size or weight, not the case with most lifting finishers like the GTS, although Cena has AA'd pretty much everyone at some point I believe. It doesn't require the ropes, so can be done in the ring or out.
I think it is one of the best finishers today, despite the fact that it is just a cutter in the end, as someone touched on. But "best" doesn't necessarily always mean "most inventive". Other ones I would put up there would be Cross Rhodes, AirBourne, and I actually like R-Truth's move that I'm having an absolute brain cramp on the name, I think it's just the Shut Up or whatever.
There are quite a few that could be better, but are a little too inconsistent, like the GTS or Starship Pain.
The RKO is definitely up there near the top, if not at the top. The GTS is a little inconsistent, as one or two others said, sometimes it's pretty obvious the knee makes no contact. Plus, it's a long setup, which could be good or bad, depending. The RKO is probably the most versatile finisher. It can be hit quickly out of nowhere, or can be set up with Orton's facial distortions and mat-pounding. It can be done on anyone of any size or weight, not the case with most lifting finishers like the GTS, although Cena has AA'd pretty much everyone at some point I believe. It doesn't require the ropes, so can be done in the ring or out.
I think it is one of the best finishers today, despite the fact that it is just a cutter in the end, as someone touched on. But "best" doesn't necessarily always mean "most inventive". Other ones I would put up there would be Cross Rhodes, AirBourne, and I actually like R-Truth's move that I'm having an absolute brain cramp on the name, I think it's just the Shut Up or whatever.
There are quite a few that could be better, but are a little too inconsistent, like the GTS or Starship Pain.