Need Recommendation, Thinking adding Amex.

Not a Huge Credit Card person in the sense that I like to use them. Usually if I do I pay it off before the end of the month. Trying to get used to paying with credit card and clearing the balance out. Main reason I was thinking AMEX was because for my job I have green Business AMEX card that I'm required to use for work, mainly travel (Hotels, Car, Gas) those kinds of things. I don't get to travel by planes, maybe once every month. I'm already a Titanium Elite with Marriott. Just got told by a coworker, that I could get an personal AMEX card and link my green card to the account and can build points off my job. I just got both a 100k points gold offer and a 150k platinum offer in the mail. CREDIT PROFILE * Current credit cards you are the primary account holder of: * Chase Sapphire Preferred * American Express Corporate Green * J.P. Morgan Corporate * Bank of America Visa Signature * FICO scores with source: 780 * Oldest credit card account age: 18 * Cards approved in the past 6 months: 0 * Cards approved in the past 12 months: 0 * Cards approved in the past 24 months: 1 * Annual income $: 370k CATEGORIES * Ok with category-specific cards?: Yes * Ok with rotating category cards?: Yes * Estimate average monthly spend in the categories below. * Dining $: 1000 * Groceries $: 1400 (Wegman, Shoprite, Sams Club) * Gas $: Personal (200), Work (300) * Travel $: 2200 (Hotels, Car Rental, Flights, Uber (if needed)) * Using abroad?: If needed, I have international card for work already * Other categories or stores: Amazon * Other spend: Gym, Music, Food Deliveries (Door Dash) * Pay rent by card? No MEMBERSHIPS & SUBSCRIPTIONS * Amazon Prime member: Yes * Verizon postpaid customer: Yes * Costco or Sam's Club member: Sam's Club * Disney bundle subscriber: Yes * Big bank customer: Chase, Bank of America * Open to business cards: Maybe PURPOSE * Purpose of next card: Travel Rewards * Travel rewards preferences: Marriott but just trying to maximize * Cards being considered: Looking at the Amex Cards but open to other recommendations.