Seconding Schwab. I have no issues using my investors checking account here. ATM does charge a fee initially but it gets refunded fairly quick FYI.
Maintaining US credit cards is a bit more tricky. Some of them have worked, some haven't. My Apple card works just fine here, but a few of my others do not. Seems to be hit or miss. However, I maintain a US address in Oklahoma during my time here. PO Box & use my parents' address for physical.
I'd recommend applying for 13A / SRRV visa while abroad OR arrive with a balikbayan stamp and apply then. Renewing endlessly is a hassle I'd never want to go through ever again.
Once you're a permanent resident, the only annoying part is renewing your ACR card every (5?) years and coming into a BI office every year for your annual report. The annual report used to be a much more annoying process, but it's become fairly easy (like... 5 minutes in and out), especially at field offices like SM Aura BGC.