I had 235/35/19 front and 265/30/19 rear, and I tried 255/35/19 rear as well when 265/30s weren't available. No issues with DSC and they felt way more cushiony (in a good way), BUT the rear sidewall was noticeably bigger than the front with 255/35s and it always annoyed me to be honest, I think to have them looking right you would need 225/40s up front.

I think the "formula" is to go 5% lower in the profile for every 30mm wider you go