As Angels are an extremely popular tribe in Magic, the Herald of the Host should show up in a number of Angel tribal Commander decks, including Aurelia, the Warleader, Gisela, Blade of Goldnight, and Kaalia of the Vast decks all can find the Herald a functional upgrade over Serra Angel. However, in the case of Kaalia, Myriad doesn't activate when a creature is put into play already tapped and attacking, as would be the case with Kaalia's ability.
Whether she becomes widely played in Commander or not, Herald of the Host will be sought after by Angel card collectors everywhere. There have been decks that certainly found a space for her, although not always Angel-themed decks as you might imagine. Commanders that have adopted the Herald include Kalemne, Disciple of Iroas, Daxos the Returned, Trostani, Selesnya's Voice, and Odric, Lunarch Marshal.