All angels are stunning in color, variety and dramatic color changes from juvenile to adults!.
If you want the Angel to be the show / dominant fish in your 105, a medium size angel would be a good choice.....
Mid size~ish:
Scribbled Angel {C. Duboulayi}
Personifer Angel {C. Personifer}
fairly easy to keep.
Blue Spotted Angel {C. caeruleopunctatus}
fairly difficult to keep
Ear Spot Angel {P. chrysurus}
pricey but a strong fish about medium care, but is the largest of my current fav four!
Even though the imperator is an impressive fish.
Dwarf angels are also great additions also.
Can maintain a few with minimal associated probelms then larger angels.
Dwar angels~Centropyge:
Golden Angel{C. aurantius}
Multi-bar Angel {C. Multifasciatus}
Yellow Fin Angel {C. Flavipectoralis}
Potters Angel {C. potteri}
Multicolor Angel {C. multicolor}
These are some of my favorites.....Oh and of course I would love to get "Resplendent Angel" (C. resplendens).
Just purchase a very healthy young~small juvenile angel, provide good water conditions and a varied diet of greens & protein. I've kept almost all angelfish throughout the years. My Golden is going on six years
.
Good luck