I don’t plan to remove voices there. Given that the scene doesn’t seem to adhere to the ‘Qui-Gon, Obi-Wan, and Yoda are the only ones to learn how to be immortal’ idea, it’d be weird to only hear from Jedi from this series that span 1/1000th of the Jedi’s history. Especially since at least a few would not mean anything in particular to Rey.
I’m assuming that unknown voices would be interpreted as being random other Jedi from the past.