#4 Is definitely my favorite out of these. I would keep it in the profile.
#1 and #3 aren't completely horrible either although they look more posed.
I would personally get rid of both #2 and #5.
#2 looks like every other dull guy's profile. (no offense to you at all)
#5 makes you look tall but your feet/body are positioned awkwardly which isn't flattering. The background really isn't that interesting either.
I think you need a new photo to go as your first pic. Something similar to pic number 4 but taken more towards the front of your face. #4 could work as a first photo too but your face isn't completely visible.
You could also use a different activity photo, perhaps one candid looking photo taken at a party for example, where there are more people visible in the photo. That would make you look outgoing and social.