I can provide referral links for any of the cards listed below. All cards are USA. Please PM me if you're interested. Cheers!

NOTE for all cards: The offers aren't available if you've had the card before, unfortunately. The SPG cards also have additional restrictions (see the end of the post).

Starwood Preferred Guest® Luxury Card (personal) -- 75k bonus points after $3k spend in 3 months (expires 10/31/2019)

Annual fee: $450

Starwood Preferred Guest® Credit Card (personal and business) -- 75k bonus points after $3k spend in 3 months (expires 10/31/2019)

Annual fee: $0 intro annual fee for the first year, then $95

Blue Delta SkyMiles® Credit Card (personal) -- 10k bonus miles after $2k spend in 3 months (expires 01/30/2019)

Annual fee: NO ANNUAL FEE!

Gold Delta SkyMiles® Credit Card (personal) -- 50k bonus miles after $1k spend in 3 months (expires 01/30/2019)
Gold Delta SkyMiles® Business Credit Card (business) -- 30k bonus miles after $1k spend in 3 months; $50 statement credit after a Delta purchase in first 3 months

Annual fee: $0 intro annual fee for the first year, then $95

Platinum Delta SkyMiles® Credit Card (personal) -- 60k bonus miles after $2k spend in 3 months (expires 01/30/2019)
Platinum Delta SkyMiles® Business Credit Card (business) -- 35k bonus miles and 5k Medallion® Qualification Miles (MQMs) after $1k spend in 3 months; $100 statement credit after a Delta purchase in first 3 months

Annual fee: $195

Delta Reserve® Credit Card (personal) -- 70k bonus miles after $4k spend in 3 months (expires 01/30/2019)
Delta Reserve for Business Credit Card (business) -- 40k bonus miles and 10k Medallion® Qualification Miles (MQMs) after $3k spend in 3 months

Annual fee: $450

Important eligibility terms and conditions:

Starwood Preferred Guest® Credit Card (personal): Welcome offer not available to applicants who have or have had The Marriott Rewards® Premier Credit Card from Chase, The Marriott Rewards® Premier Plus Credit Card from Chase, The Marriott Rewards Credit Card from Chase, or The Ritz-Carlton Rewards® Credit Card from JP Morgan in the last 30 days.
Starwood Preferred Guest® Credit Card (business): Welcome offer not available to applicants who (i) have or have had the Marriott Rewards® Premier Plus Business Credit Card from Chase or Marriott Rewards Business Credit Card from Chase in the last 30 days, (ii) have acquired the Marriott Rewards® Premier Plus Credit Card from Chase or the Marriott Rewards® Premier Credit Card from Chase in the last 90 days, or (iii) received a new Card Member bonus offer in the last 24 months on the Marriott Rewards® Premier Plus Credit Card from Chase or the Marriott Rewards® Premier Credit Card from Chase.
Starwood Preferred Guest® Luxury Card(personal): Welcome offer not available to applicants who (i) have or have had The Ritz-Carlton Rewards® Credit Card from JP Morgan in the last 30 days, (ii) have acquired The Marriott Rewards® Premier Plus Credit Card from Chase, The Marriott Rewards® Premier Credit Card from Chase, or The Marriott Rewards® Premier Plus Business Credit Card from Chase in the last 90 days, or (iii) received a welcome or upgrade offer for The Marriott Rewards® Premier Plus Credit Card from Chase, The Marriott Rewards® Premier Credit Card from Chase, or The Marriott Rewards® Premier Plus Business Credit Card from Chase in the last 24 months.