You definitely want a credit card overseas for emergencies and other use cases. Does it need to be with an airline? Nope. What is a good credit card depends on your spending habits and how much you spend. I prefer the platinum but it’s ease of use and I put a fortune through my cards for the points.

Nerdwallet and some of those sites can help point you towards some cards based off categories but everybody’s “best” card is going to vary due to spending habits, and volume of spend.