OK so you don't really like long-haired cats and don't like the ones that looks like dogs. Also you want one thats good for you. I don't really know if Main Coon is righht for you becuase I don't know your purrsonality. But I think that you might have ups- and downs for a main coon.
Not too active
Downs (for you):
Looks a bit like a dog
I LOVE Main Coons becuase they are timid and shy - I have one.