[Deadbug]

OMG I'd have a field day with a remodel like this.

With the exception of laminate, nearly any natural stone countertop you install is going to require yearly maintenance.

Black granite is probably what I'd go with because it's aesthetically pleasing to the eye. Marble is a maintenance nightmare. I have black marble around my fireplace and it's already got white spots where Gabby peed on it. However, I need to caution you that anything citrus left on the black stone will etch in, even if sealed. The rule is, wipe up as soon as you're done prepping food and you'll be fine.

Concrete would be my second choice. It's a little less maintenance but a little too industrial for a house of that period.

Give me a minute to think on it.
I wish I could walk through to get a feel for the room. Pictures are so hard to go by.