Of course those two aren't the best Triple H moments, just recent ones. I actually think the Sting one is worse because he wouldn't job out for Sting and also making it look like DX is better than the nWo.
As for his best prick moment: Booker T is probably number one. It's a racist angle where the racist won, Booker T lost in his home town at WM, Booker T hit the houston hangover for Triple H to kick out where he should have lost, and yeah, taking forever after the pedigree.
The Summer of Punk--well, you have Kevin Nash to blame for faking an injury and refusing to job to Punk.
Hell, now that I think about it The Authority in general just because of how long it over stayed it's welcome--and I just know it'll come back one day.

The only thing that comes close is unmasking Kane on RAW, something that should have never happened EVER and if it did--at least be a PPV.
Best Triple H moment? Yeah, the UT thing was cool, but I liked his hell in the cell match with Cactus Jack. Also his last man standing match with Flair where did the put him down sign was pretty awesome.