I would get Bielefelders (I asked my Vet how to pronounce that Bee-lay-felder, he is from Germany), they are a duel purpose bird and are beautiful.I agree, a meatbird rooster will be way too heavy for your girls & will hurt them.
I assume you are speaking about 'Redbro/Freedom Ranger/etc. type of meat bird (not the cornish crosses, as they can't reproduce naturally - even if they lived long enough to mature)
My suggestion would be to get a 1/2 doz. or so straight run meat birds and hold back a trio (one roo, 2 girls) to keep and hatch from in subsequent years, and process the others for meat this year. I do suggest getting at least double what you want to keep (well, since we are talking small numbers, anyways), so you can pick the best/healthiest to hold back.
Good luck with the Polish - I hope the Lady has some still!
Or even Brahmas, again dual purpose, and decent egg layers and gorgeous.
Though those two breed are still way too heaven even for the midnight majesty Marans I would say.
Oh gosh! I forgot to say; speaking of MM Marans, this morning I came out to feed and I heard this squeaky crow and my heart sunk - oh Shirley! I was going to bawl.
Then I looked in there and saw Mr LC

Anywhoooo back to the meat birds - if I had a way to process them I would get a dozen of so Bielefelder Roos to raise for meat - sure they take longer to grow but I bet the meat is better for that. I hear Marans are also a dual purpose - anyone else hear this? They are rather uncommon here.