Grookey for Ash and Scorbunny for the female companion is pretty much set.
Depending of the decision to give Ash a second starter, Sobble could also go to Ash. In that case they could easily give it a backstory similiar to Goomy, where Sobble is scared of fighting other Pokemon at first, but develops out of his fear to a point where it slowly becomes one of Ash powerhouses for Galar, maybe even his ace for said region. There's a ton of potential there, so I prefer Sobble to be Ash's Pokemon for the only reason that Ash is the one who battles the most and that may sound sadistic but I want Sobble to encounter as many strong Pokemon in battles he can endure in his "fear phase".
Grookey is also a likely candidat to become Ash's ace. Would be the first Grass starter ace since AG and while Sceptile is already a speedy Pokemon, Grookey could be more of a slow gorilla Pokemon with a similiar battle style as Paul's Electrivire.
Corviknight could also become one of Ash's Pokemon. I can't see why people think it's "too edgy looking". Ash caught similiar edgy Pokemon like Glalie and it worked out. Is it the dark look? The red eyes? Whatever...
Scorbunny for the female protagonist should be obvious. May it be Bea or Gloria. I can see it being a Pokemon for both of them. For Bea because it seems it could end up being a Fire/Fighting and for Gloria because it's the most obvious starter for a girl, is probably the most marketable one of the base stage's, doesn't need to evolve because of that and that could help to write a good human/pokemon bond for a beginner trainer. People call Oshawott, Chespin and Rowlet successor's of Piplup, ergo calling them Piplup 2.0 and onward and while I can agree on that I think Scorbunny could be the true Piplup 2.0. I at least can see the most potential to become exactly that.
Wooloo is one Pokemon they could give Gloria, but if the unrevealed Squirrel Pokemon is a Normal type, then I can see her catching that instead. If not then maybe even both. Her getting Drednaw was weird for me at first, but then I slowly realized that it could end up being similiar to Mamoswine.