Just throwing a plausible mid-luxury tier card out there:
AMEX RESERVE ($2500/yr)
$1000 travel credit (a credit similar to the CSR as opposed to the current Plat airline credit)
$300 Uber credit ($25 per month)
$200 annual dining credit
$300 annual Saks credit (or insert other department store here)
Complimentary CLEAR access
$550 airport lounge credit (so no SkyClub-specific access built in, but the ability to purchase a club membership for DL, AA, UA)
Annual Travel Insurance
DL Gold, Marriott Platinum status
5x MR points on travel, 3x points on everyday spend (would probably require bumping up the Centurion to 3x spend too, which I'm surprised hasn't happened)
Plus the usual Precheck/Global Entry waiver, etc