The first is a nice male. The second pic is hard to make out and I think the bottom is a male and not sure of the top one unless you can get another pic.
This is also a male, maybe a younger one or the subordinate one.
what size tank is this? You want to have at least 5 because they are schooling fish (if you have the room). 2 females to 3 males would work fine.
it a 200 litre 40 uk gallons, i have 3 boesemani's , i asked the guy at my LFS for 1 male and 2 females ,just to see how they were but i think i might have 3males