@Cory M.Depends what kind of banking you need, but after searching high and low state department federal credit union (with an American citizens abroad membership first, like 100 bucks) and capital one have worked best for me to avoid the nightmare you mention of trying to deal with US banks from outside the US.

The other requirements in the listing such as credit score, rental history, etc would remain unchanged. 

I also have zero debt (student loans paid off, bought and paid off multiple cars, etc), but my credit score isnt amazing just mostly cause of lack of accounts (lets call it around 620 fico 8, higher on credit karma).  

I heard they did so in the past.Additionally, your review score is awesome.

Highlighting your extensive experience and strong FICO score will also be beneficial.

I'm in escrow on a duplex, my credit score is high 750+, I'm a W2 employee, and I plan on keeping this duplex for more than 10 years.

On investor products we would be maxed at 75% depending on the documentation type / fico score for the borrower. 

Quotes vary based on credit scores, points and other factors.The lower rates haven't quite had a foothold in the market yet, meaning active buyers don't have much competition...yet. 

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

What's the lowest credit score you will allow?