I’m asking for suggestions for someone who doesn’t open more than 4 personal cards every two years.
I have a lot of Chase cards already and can’t do CSR/CSP bonus so maybe it’s time to branch out to the biggest bonuses? Don’t have to limit myself to Chase cards

You stay in cheaper hotels on purpose? I’ve churned Chase IHG cards several times, and sometimes the intro bonuses are insane, like enough points for 7 nights. Aside from the cards I mentioned, I don’t know much about airline cards. Delta bonuses can be pretty good but the miles don’t go nearly as far as Southwest. But yeah, Doctor of Credit is a great resource regardless.
I stay in them because they are closer to where I want to go in city. Usually the Mariotts are closer to the center and that’s not always where I want to go
IHG might work
Edit: I just went ahead and applied for the IHG card, thanks