1, 3, 2, 4.
Although the order might change after a couple of AoE rewatches. Hard to rank having seen first 3 multiple times and number 4 only once.
First one is still the best - largely for the initial "wow" factor. The first Blackout scene is still the best scene of the whole franchise. Puts a smile on my dial everytime.
(My second fav scene is OP VS Meggs/Screamer/Grindor in ROTF).

I know this for the live action flicks, but I'd be interested to know where people would rank the '86 cartoon movie in comparison.
(Me: 1, 3, (86TFM), 2, 4.