The fourth picture looks exactly like one of mine. I don't have a name for mine either but he's one of my favorites because he blooms quite nicely and stays in bloom month after month. Nine of them to be exact!
Good to hear that highseas. I hope mine can bloom for that long...I had to use insecticide on em since I found one bug in it. I also soak the root in systematic insticide just to make sure no bugs/larva survive after a week.