#1: Gig, my first thought on the first one was a goniopora as well. The polyps on the far left and top center look like they have a ton of tentacles (which made me think goniopora.)
#2: Euphyllia sp. (My guess on species is commonly called "frogspawn")
#3: Caulastrea sp. ("Candy cane" coral)
All-in-all, they're all considered LPS. As for why your last coral is bleaching, it could be that it was stung (possibly while in the store for sale), could have a powerhead pointing too hard at it causing tissue loss, or several other reasons. We'd need to know more about your tank.