Here are my Priority Pass rankings for reference. Citi is slightly better if you have a big family, but otherwise Chase and Citi are both good as opposed to AMEX which is more limited and costs slightly more for additional guests.
1. Citi - you get $28 credit at PP restaurants, can bring two guests OR immediate family (which can be more than two). Immediate family defined as "spouse, domestic partner and/or children under 18." Authorized user is $75, and I believe they get their own card (someone can confirm)
2. Chase CSR - you get $28 credit at PP restaurants, additional guests are $27. Authorized users are $75 and they get their own PP
3. AMEX Platinum - no $28 credit, two guests only, additional guests are $32. Authorized users are $175 for 3 and they get their own PP