Altums are not the easiest angels, especially wild altumes. Tank bred scalare angels from the LFS are the easiestIf you want something pretty, and simple, a ram tank is nice. You can have Altum Angels, or other angels, and then on the bottom level, plant anubias, hornwort, and as many plants as you can find. And then you could have small catfish in the bottom.
bolivian rams are the easiest out of the variations out there.They arent beginner fish, but they are relativelty easy.