Best RTS of all time?

[okr]

1. Dune II
2. Warcraft II
3. Age of Empires

I know, Dune II is not really the best RTS game of all time, but - even if wasn't the very first RTS game - it was the game that started it all (without Dune II no C&C, WC and AoE) and it was the one I had the most fun with.