Kaalia is limited to Mardu, and her thing is more "cheat the big-bads of each of her colors into play" than angel tribal. I'd welcome a proper angel commander, something like this:
The Voice of the Host (2)(W)(W)
Legendary Creature - Angel - 4/4
Flying, vigilance
(T), Pay 4 life: Counter target spell that would damage, destroy, or exile one or more permanents.
(W)(U)(B)(R)(G): You may put an Angel creature card from your hand onto the battlefield.
Key points:
- Costs 4 or less mana.
- WUBRG color identity from an ability, not from casting cost, enabling use of any desired combination of colors/angels.
- Thematic and powerful ability - protection against boardwipes (and against single-target removal, if an individual piece is worth leaving your board open to wraths).
- Low-key Angel tribal synergy - a small cost reduction for more expensive Angels if WUBRG is assembled, and protection against counterspells.
I'd probably die of happiness if that were actually printed.