There are ways to make an idea like this work. The key is that you need to turn the whole concept on its head in some way. You want the new “Vader” to be imposing and authoritative and worthy of the mantle, but he also needs to be a very different character from Vader once we peel back the layers and see his inner motivations.
That’s why I like the idea of Ben Solo taking up the “Vader” mantle reluctantly, and hating the role he feels he has to play. Maybe he isn’t actually even on the Dark Side. I’d go all in on emphasizing the “play-acting” nature of the character.