On old map nights when Phantom was popular (largely thanks to me ), I dominated it, despite being craptastic in melee. Not exactly a Diplo, but rather close. I believe Krayzee made a few rants about how I was always winning because I knew everyone's strategies (despite the fact that I didn't, and because I was always winning, everyone knew mine).
Of the WCIII AoS's I'm good at, there's Battle Tanks and Battleships. Battleships I'm usually in the top three of any given game, often top. I really go for a bad strategy on purpose just to make it more interesting; last few games I went sailor -> 3500 shell and kept that until someone got something that I couldn't compete with. Really, that for 5000 gold I could increase my life sevenfold and that I still dominate with this is really impressive, methinks. In battletanks, I'm not godlike, and sometimes I screw up and play badly, but I'm overall very good. If anyone else is interested, I can describe my strategies, but I don't think anyone else plays this.
In Diplos, as I'm said, I'm godlike. In Rise of China, I won first time playing; I won second time playing; I lost third time playing because I got teamed as Qingdao by both Mongolia and Korea when I chose advancement over their massing, but I won fourth time playing. I didn't play a fifth time. While playing Greece, I don't believe I ever actually lost. I always find a way to end up on the winning side, and even if I'm not the driving power behind victory, I win. When a game ago I got backstabbed and they gave me three bases to work with, I built up and was the deciding factor between who wins (invaded Crete). I never lost in 'Shattered Kingdom', lost two times out of maybe forty games of Civilization III, lost one of five games of Civilization IV and lost none of three games of Civilization RT. I lost once in the whole genre of crappy build-moneymakers-unbalanced-army 'diplos', like Medieval Builder, though I didn't always emerge #1. Admittedly, I don't play those games a lot. I never got close to losing Lords of Europe (~10 games), lost Europa only first time playing, etc.
Anyway, I own at diplos. SC-based, I didn't play them so well, but I was always good at Civilization and I won Diplomacy 2.8 first time playing. Not as #1, but we made an alliance.
Ex, WCIII account? You still play? I played rise of China with Crimson Magnum and a few of my WCIII-friends yesterday, great (and easy) game.
None.