I would ignore DragonKing. He is in the same category as someone like StephanGH, they simply don't understand cavalry dynamics and are new to the scene compare to most people.
People want to sit here and pretend like heavy cavalry takes skill? I don't know, but watching a heavy cavalry regiment run in a slow, tight circle, bumping into each other and team wounding and still winning do the ghost reach and HP... yeah that isn't skill. That is a broken class, I mean you can just watch the last CNWL. There were 2-3 regiments more skilled than the winners, but lost to what I described above.
Back to the actual list. Not having Erik, as the #1 Hussar player is an insult. How many players do you know, that strategically drop their sword mid fight to throw off the enemy? Truly a pioneer of tactics.