I think at the very least we should try to have each character whose voice we hear make at least a brief appearance as a force ghost in that scene.
As shown before, Yoda, Anakin (Who should possibly be shown as sebastian shaw if possible for continuity), Luke, Obi-wan have been integrated into the scene well. I would like to additionally see at least Mace Windu and Qui-Gon Jin (Especially Qui-Gon as he was the very first jedi we see chronologically, bringing the story full circle in a way). Ayla Secura wouldn’t be too hard to add from footage. Luminara Unduli has like one shot in AOTC. Adi Gallia, Kanan Jarrus, and Ahsoka Tano and don’t have any footage that I am aware of so including them might prove challenging aside from using cosplayers or something.
There may be an answer to some of this. Massive 2021 Star Wars spoilers, seriously do not look if you care about spoilers and news for the future of SW media.