My personal favourite of those is the second one, several of my characters (two mayors and one alt) have it. It seems to be pretty common. The first and third one are also really cute in my opinion, and the first one especially is rather rare I think, I don't remember ever seeing it online (if rarity matters to you).
I like #2 the best. It has eyelashes and is more natural. #3 is cute, but no lashes. #1 and #4 have the oddest lashes and it's pretty obvious. They are still cute, but #2 looks the most natural.