How did some of you guys miss that Atlantic City monster all this time? It's been publicized to no end for eons. Only problem, it is billed as "only partly functional". The Wanamaker in Phillie is considered that largest FUNCTIONAL organ.
I've heard the First Congregational organ a number of times, but that was when it was still a "smaller" four-manual. I don't live in the L.A. area any more. But that church is more than worth a visit.
The Crystal Cathedral also has two consoles, but they are not identical, in fact they look quite different. Given the apparent politics around that place, they have had several different organists since Swann left, and I'm not even sure who is doing it right now. Pardini is back east again.
In both of the above cases, there are really at least two organs at opposite ends. First Congregational lived for well over 30 years with its original Skinner. Then somebody unloaded some money on them and they put the Schlicker up in the rear balcony (which is exactly what it had been) in 1969. Now they have added even more, and I assume they have taken out the seating above the crossing sides and put pipes up there, too. (There seem to be some politics there, too, as they can't seem to settle on a senior pastor. Dr. Fifield was the senior pastor for 32 years, and since he retired - about 1967 - they have been through a whole roll call of pastors.) That church was once known as a citadel of conservatism around L.A., apparently when Fifield was there.