So many people focus on attacks proliferate. It's.4/4 with lifeline, vigilance, death touch and flying for 4.
Granted without red you download some of the best Angela.
Morophon is an option, you could also pick up any of the red/white angels. (Aurelia is a lot of fun (with a free sac out and adarkar valkyrie, you go infinita attack phases)
My thoughts are to go Jodah if you insist on add all the angels, but Lyra Dawnbringer is my sweet Angel commander. She is pure fun, with an actual benefit to the tribe.
I honestly think that angel tribal works best in mono white with Avacyn, Bruna or Gisela as commander. Each has a different play style, though. With Avacyn you want to play board wipes... All kind of board wipes. Bruna is similar controlish with less board wipes and playing around her ability to get an angel back to the field and Gisela is aggro/life gain. I'm not sure if Sephara could be a valuable commander. She seems more build around than Avacyn but very similar.
For Boros I would suggest Aurelia or Feather. Aurelia would has an aggro theme mixed up with some possible win the game combos (infinite combat steps) and Feather can be build very effectively with tokens. You can ramp with Path to Exile or cheat some Angels from your deck with some of the red chaos spells.
For Naya there is the new Bab Promo Rienne and Mayael the Anima. I don't feel like Rienne is super good in angels. You want to sacrifice your multicolor creatures for some kind of value and than repeat it with her effect later. There aren't any angels with such effects. Mayael can help out to cheat some angels. There are plenty of 5 atk angels but some of the lower atk angels are interesting, too...
Bant has some Angels and an angel commander with Jenara. She can be a very good commander. She has no synergy with the tribe other than being an Angel herself. She works great with counter strategies.
Mardu has both Kaalias and Tariel. I personal think that Kaalia isn't Angel tribal. Why would you limited yourself to angel tribe when you can have Dragons and Demons too. In addition old Kaalia isn't that funny in a casual game. Tariel can be funny but the random selection hurts a little. She has no synergy with the tribe.
I think you can play Yennett as Esper commander. There are strong Angels with odd Mana cost. Specially with 5 Mana and even in the 7 Mana range with Angel of Despair, Angel of Serenity, Chancellor of the Annex, emeria shepherd... and some more. You can back the angels up with some powerfull spells (obviously with odd Mana cost).
Last Morophon. If you want to run Morophon than you should focus on Angels with lot of Mana symbols in the Mana cost. Maelstrom Archangel or Jenara for example can be cast for free. Lightning Angel for 1 generic etc. He needs to be on the field but that's true for all commander without Eminence. He cost 7 generic and counts as angel so you can reduce the mana cost with tribal support stuff.
I think you are talking about Atraxa, Praetors' Voice in your first paragraph?
Lyra Dawnbringer is definitely an option. I really like your deck
For Boros I would suggest Aurelia or Feather. Aurelia would has an aggro theme mixed up with some possible win the game combos (infinite combat steps) and Feather can be build very effectively with tokens. You can ramp with Path to Exile or cheat some Angels from your deck with some of the red chaos spells.
For Naya there is the new Bab Promo Rienne and Mayael the Anima. I don't feel like Rienne is super good in angels. You want to sacrifice your multicolor creatures for some kind of value and than repeat it with her effect later. There aren't any angels with such effects. Mayael can help out to cheat some angels. There are plenty of 5 atk angels but some of the lower atk angels are interesting, too...
Bant has some Angels and an angel commander with Jenara. She can be a very good commander. She has no synergy with the tribe other than being an Angel herself. She works great with counter strategies.
Mardu has both Kaalias and Tariel. I personal think that Kaalia isn't Angel tribal. Why would you limited yourself to angel tribe when you can have Dragons and Demons too. In addition old Kaalia isn't that funny in a casual game. Tariel can be funny but the random selection hurts a little. She has no synergy with the tribe.
I think you can play Yennett as Esper commander. There are strong Angels with odd Mana cost. Specially with 5 Mana and even in the 7 Mana range with Angel of Despair, Angel of Serenity, Chancellor of the Annex, emeria shepherd... and some more. You can back the angels up with some powerfull spells (obviously with odd Mana cost).
Last Morophon. If you want to run Morophon than you should focus on Angels with lot of Mana symbols in the Mana cost. Maelstrom Archangel or Jenara for example can be cast for free. Lightning Angel for 1 generic etc. He needs to be on the field but that's true for all commander without Eminence. He cost 7 generic and counts as angel so you can reduce the mana cost with tribal support stuff.
There are a few more options.
Edit: I added the card tags