2nd Photo is your best one and I'd use that one first.
1st Photo is good but the 2nd one is better and I'd recommend only having one picture like that.
Try them both separately as your 1st photo and see which one does better.
Like Toast said, 3rd one doesn't really say much and you don't look great in the photo either.
4th one is okay but I feel like until you have a better physique, I wouldn't use a shirtless picture but I could be wrong.
- I have a feeling though that this picture, you're not flexing properly and the lighting is good and you could actually be leaner than I think. Try retaking more photos like this but flex your abs as hard as you can (without looking like you're flexing your face off) and try to get better lighting and/or just get leaner.
Test test test. See if not using a shirtless picture would be better.
You have good variety though.
Things to work on:
1. Keep working out and developing a better physique. (always something you can work on and develop slowly over time)
2. Get some pictures of you doing a different activity. (volleyball on the beach, out with friends, skiing, playing sports)
3. If you have lightroom, use it to your advantage and edit pictures so they look better but not so much that they look like they're enhanced.
I just took this photo and I edited the fuck out of it and looks 100x better imo.
View attachment 1
Hope that helps.
Profile looks decent already though.