Generally Flame and Coral Beauty are considered more hardy and better beginner fish than the Lemonpeel, however if you want the Lemonpeel, give it a go. Dwarf Angels like to have a good amount of Live Rock to graze on, my Coral Beauty would not eat what I offered for a week, but he was fine just munching LR. They also do better IMO with good water flow....Aggression wise any of the 3 on your list will do fine, trust me, I have far more "aggressive" fish in my tank than you, and my Coral Beauty is afraid of none of them, including the larger Asfur Angel.
Give me a vote...I go Flame for you...Absolutely gorgeous fish that add amazing color to any tank, Coral Beauty is a little more bold though.