Here's my two cents-
The first male, though it's kind of hard to tell because it isn't a straight on flare shot, has several issues. Tried to highlight them below.
The dorsal is a bit long, and has either damage or random extended rays. It should be a bit more forward-facing and broader, too. The caudal has some damage to it, and the anal looks a bit too long, and should also be more forward facing.
The second male:
He's got nice vibrant coloring, but has some issues as well. The branching on the caudal and dorsal is a little bent, could definitely be straighter. The caudal penducle should also be a bit thicker, where the body meets the caudal. He's also got some bad scaling towards the front of his body. The anal is a tad long, and the blue pattern isn't continued on the anal fin like the other two fins. Ideally the pattern should be consistent on all three fins.
The third male I believe is the best overall, although his caudal is a bit off balance, the dorsal is just a touch too short, and the anal is a touch too long. Definitely the best out of the 4, though.
The fourth male, the mustard gas, is my least favorite. His anal is very, very long, and his dorsal is short. His ventral fins should be longer, and there are a few branches on the caudal that are bent/wavy. He also has a mild spoon-head.
So, my choice would be the blue. Hope I helped. =)