Silver Star stacks on the lift hill with three trains - that must be the closest to "theoretical" capacity ever. With around 3mins per lap and three trains, that puts it at +2100pph.
When running the "power hours", Cedar Fair parks can do a pretty great job too. I've seen Maverick and Fury 325 absolutely devouring their queues. I'm sure the locals to those parks would have more detailed accounts. Perhaps
@Hyde even has some official figures from somewhere?
I would swear we had a thread on ride capacities aeons ago; of official RCDB capacity listings, one of the largest coaster capacities we caught was Iron Dragon, listed at 2,000 riders. It too has a 3 train operation, and simple loading procedure (jump in and ratchet down the OTSR), meaning ride ops don’t need as diligent a “fit test” on restraints as risk of riders falling out is minimum. Gatekeeper also gets an honorable Cedar Fair mention at 1,710 throughput.
For Maverick and Fury 325, they are listed at 1,200 and 1,470 respectively. Silver Star is listed at 1,750 however, so indeed there are other theoretical factors that can influence that number. But doing quick samples on RCDB, B&Ms do come up often as capacity machines. With huge seat counts and comparatively easy loading procedure (clamshells and OTSRs), they make for shorter pit stops in the station, especially if running with no seat belts. By the RCDB count, I
think Incredible Hulk might take the cake at 1,920 pph. (On the IoA hunch, I also checked Hagrid’s; 1,700 pph)