Best Travel Card if I'm forced to use Corporate Portal + Get Reimbursed

New job, I travel somewhat frequently but I am required to book on their corporate website and use my personal card. Obviously I am not able to use the credit card portals since my company mandates using the corporate page for the best prices. What would be the best option in this case? AMEX Green seems to allow 3X on everything even not booked directly through AMEX portal but I wanted to see what others may be using?