I just got the Delta Amex gold. It had a great signup mileage bonus and no fees for the 1st year. The platinum may be worth it for you. It has lounge access, a bigger bonus. But the fees were around 500 at the time
Amex Platinum—you'll get 5x Amex Reward points for Delta flights on top of Delta miles + $200 yearly credit to use towards checking bags, food, inflight WiFi + lots of perks on hotels: preferred rates, onsite credits, free room upgrades. Annual fee is $500 but pays for itself!
CSR or Amex plat. Both have high annual fees but worth it IMO. They’re the go-to cards for consultants and there’s a million websites that compare them so just look at like points guy or something and go from there. I have CSR and haven’t paid for a flight in 3 years