The locations of the bus stops at each park change every few months or so, so you can't really choose a resort based upon where its theme park bus stops are located. Sorry.
It's also been my experience that it's a "mixed bag." For example, the last time I stayed at CBR, the bus pick up slot at MK was as close as could be (slot 11, first stop on the line all the way to the right), but the Epcot pick-up stop was as far away as could be -- I'm not sure we were still in Florida. On that same trip, the MGM stop was close but not the closest, and the AK stop was far but not the farthest.
On my recent trip staying at POFQ, the MK pick up stop was where the CBR pick up stop was the last time I was there. So our MK POFQ stop was really close, but our MGM POFQ stop was the farthest possible stop. Epcot was kind of close, AK was kind of far, etc.
Sorry to go on and on with a question I answered in the first sentence, but I just wanted to flesh it out for you.