No credit card required
Browse credit cards from a variety of issuers to see if there's a better card for you.
Funny thing is that between my wife and myself just about all our 50k+ cards get used sparingly and there are a few on the chopping block. The only exception is my Amex EDP. It gets probably 5k-6k a month put on it. Daycare alone is 2.5k.
Going back to the OP don't forget the airline cards. As a Chase/Visa guy I get value out of Citi AAdvantage as my World Elite Mastercard for Postmates and Fandango purchases ($5 dollars off both). Since you earn both MR and CSR you can dump those points over to BA and book legs or complete flights on American. Oddly enough, Citi doesn't have American as a primary partner or even BA yet they issue a co-brand AA card. Also the top cards from Citi are all World Elite Mastercard anyways negating the value of a catagory killer Citi AA card in your lineup. I estimated it adds about $346 dollars a year in value to my lineup.
In my estimation the best BT card is a NFCU if you can get in. They will give you up to 80k line on their Flagship and in most years the annual offer is 0% APR or 1.99 APR. They will allow you to BT from a mortgage if you want. What you could do is take out a home equity loan and make a 40k-50k BT to NFCU negating most of the interest. That is if you'll commit to making 4k a month extra payments to the NFCU for a year with a brokerage already well funded.
Here is what I'm thinking once I move through the SUBs.
AMEX Gold x4 Dining/Groceries (MR generator)
Citi AA x2 Gas ($5 dollars off Postmates/Fandango)
Rakuten x3 Shopping Portal Card (Linked to MR)
CFU x1.5 Utilties/Non Bonus (2nd Shopping Portal Card)
CSP x2 Car Rental/Transit (1.25 Chase point multiplier)
Then combining it with an airline strategy.
American (Citi AA for bags, transferring MR/UR to BA for legs)
Untited (MilesPlus for bags, transfering over UR points)
Delta (AMEX Gold incidental to Delta for bags, transfering over MR points)
This way your covered by the big 3 airlines on bags with only 2 airline cards and are using 1 to 1 transfer of Chase/United and AMEX/Delta where its most valuable for domestic flights. Then you can choose between all three as to which one has the best price or schedule.
Rakuten has x8 bonus at the moment on Expedia. If you have the card its a x11 bonus. If you have the AMEX Gold it converts to x11 Master Rewards. Rakuten's bonus has been as high as x15 on Samsung (x18 with the card/x18 Membership Rewards) for cyber Monday.
The only things you need to keep at the top of wallet is AMEX Gold, Citi for gas and CFU for the occassional retail purchase. CSP/Rakuten can sit in the sock drawer like the balance transfer cards.