I don't know if I'd put a Queen Angel in any size reef tank, unless you plan on making your corals sacrificial lambs
Queens are one of the worst angels when it comes to picking at corals. I've seen Queen Angels destroy 180G reefs in under a week. IMO, they are meant to be kept in fish only setups. A 260G FISH ONLY setup would be perfect for them, a 260G REEF, no, I would not risk it, even with the best food supply.
Even if you get this fish as a juvenile, you can't train it to not pick at your corals, that is just natural instinct.
I'm sure there's people out there that have success, but I don't know if I'd risk it for the sheer fact that catching a juvenile angelfish in a 260G tank just is not my idea of a good time.