I might try 3 in a smaller size (although they are all Talls, so I have to order). And keep #2. I can't think of where I would wear #1 and #4 is so so comfortable but also a tad see through.
2 is my favorite and super flattering on you! I like the idea of 3 but I think if it were thicker, more structured material and cut slimmer it would look better. My favorite dress like that is from j crew.