I curse my desire for all things Seaboard Air Line. Everything they seemed to have was the oddball.
I would love to see an ALCO RSC3:
These became Seaboard Coast Line Engines:
I think the Soo Line was the only other US RR to own them, but a few foreign RRs owned them too.
The 3-axle trucks are cool, the body looks just like the RS2 and RS3, but nobody to my knowledge has ever done a RSC 2 or 3.