Pere Marquette SW1 #11 is now in retirement at the B&O Museum in Baltimore. Prior to the roof collapse, it was the museum's "go-to" engine. It was PM 11, then Chessie/C&O 8401, then back to PM11 at the museum. I rode behind it many times in the early years, perhaps even with B&O Bill at the throttle.
I've got the PM 11 in Chessie 8401 paint from MTH. I've also got the C&O Yellowbelly from MTH. Unfortunately, I've never ridden behind the real one and probably never will (but I can dream!).
Other than a GP30 (I ran WM 502), I don't think models of the things I've run are out there. In addition to the GP30, I've run TTC PCC Trolley #4602 and the CP Huntington trains at the local park.