Travel job credit card maxing recommendation

Hello!

I am about to start a new job where I will be traveling very often.

My husband plans on adding me as a second user to his Amex Platinum- but what other cards should I consider to get points on flights, hotel, food, if I'm flying once a week!

Might be different airlines, but I live at an American / Southwest hub

I might have a choice in hotels, and am considering the Marriott Bonvoy.