Fuzzy Snugs- annoyingly good with the 1. flame, 2. airblast, 3. Axtinguisher combo
Good god that was painful when I ran into him. I expected an easy kill since it looked like he was just W+M1ing at a distance, and that was a horrible mistake; ran facefirst at him, meatshot, double jump over his head, and I expected to land another shot in his back and finish him off, but I was lit up and airblasted during my jump, and axe'd when I landed.

I have to agree with Crap, although I personally would vote for Striker, Pyro is such a varied class it's hard to judge.
We should throw Leetberry/RedCross on the list for his Beanie Pyro Axing Antics.

Fuzzy was one of the PL server spy mains, and was good at it, now he plays pyro and is good at it, I am afraid of when he starts going demoman or sniper.
There are a lot of aspects to pyro, surprisingly considering it's supposedly the "w+m1" class, so I personally couldn't pick a single "best" pyro.
I also think more than some of the other classes mentioned, we have a lot more really good and standout pyros and I haven't even ever played with a few of the people mentioned (or at least not when they were pyro),