No credit card required
Browse credit cards from a variety of issuers to see if there's a better card for you.
I don't want to be unhelpful or snarky, but just want to point out that your Subject Heading probably doesn't not invite the maximum views or resposnses. Breaking up multiple question and giving a very specific subject heading will give you the maximum respones and advice. Many here will just scroll past a post that does not have a specific subject heading.
Just some unsolicitied advice. You have come to the right place for your questions.
It's very important to understand that the Macy's American Express card has absolutely nothing to do with the American Express we talk about on here, which are cuards issued by American Express Centurion Bank. AMEX is just the processor for that Macy's card -- it could just as easily have been a Visa or Mastercard. So don't conflate co-branded AMEX cards with "real" AMEX cards.
You shoud be able to get back into Macy's after 2 to 3 years of reestablishing credit, even if you burned them.
Synchrony is generally very easy to get back into, even if you burned them, about a one year post discharge and upon reestablished credit. So you can apply for a Wal-Mart card or a Lowes card or a CareCredit card. They may give you a crappy $400 limit, but using calls to the backdoor every three months you can easily get these up into the 15K to 35K range within a year or two with soft pull CLI's by calling the backdoor number to Credit Solutions.
BofA is relatively easy to get into if you start with one of their secured cards and then it graduates. I have the original secured $1000 card, which graduated and got a CLI to $5K. Then I said I wanted the Alaska Airlines card so they approved it when I offered to give up the useless 5K card they have given me. BofA is definitely doable. If your BK is now two years old and you have established 3 to 5 new revolving cards on your own, either through secured cards, crap cards like Credit One/First Premier, or even a couple of shopping cart trick cars, you should be good to go to make the next step to higher quality and more useful Synch cards and Macy's. I don't know Best Buy's policy abot letting you back in (Citi can be jerks sometimes) but I know it can be done. Even when Citi won't give you one of their Visa cards, they will approve you for co-branded store cards.
You are in good shape. Just make a plan and stick to it.