If Ady has that one dude who did the younger Vader dub then I’d definitely prefer that. But the last thing I think any of us wants is an impression that immediately stands out. At the end of the day, Lucasfilm has already been doing AI Vader for Kenobi, so it’s not like this is something completely disagreeable.
That’s also the same guy who did the ANH Vader for DSG’s edit, matching the ANH-style distortion well. I’d say either him or another competent Vader impersonator would do the job well.