So, I took a look to see if one would fit:
And yes, indeed she does! A little coaching for the untrained eye: essentially the only feature representing a major challenge is the Wyvern canopy, significantly forward of the general pattern. What I would do for that is to mold in the front windshield only - and let the (Wyvern) builder add a blob of white glue for the canopy (or it could be depicted opened - slid back). That would be a first for Matty's Models - which has never required you to add anything (other than landing gear and prop(s)) up until now.
All other "substantive" discrepancies of the Wyvern present no problem whatsoever. The huge, protruding spinner(s) gets chopped off in any case, to be reattached with the (PE) propeller(s) - now youll simply chop off its tip, first - and, for all but the Wyvern, throw away the base - or throw away all of it, for the F4U. The 'Vern's tail stabilizers are angled, with small fins, but in 1/550 scale, this is definitely in the category of "close enough to not matter". Finally, the landing gear are a bit shorter than (most of) the others' - but again this truly goes into the category of "nobody will even notice, much less care".
The above (heavily reworked) art I filched today directly from the instructions of the Trumpy Wyvern kit that Donny got me - and that's the reason I didn't evaluate this until now: I had trouble finding a good Wyvern 3-view drawing. But now I have - and you just reminded me about it, Mike - thus initiating the possiblity of the first-ever Matty's Models "four-fer" - something I had never dreamed possible - and for that, both you and Donny have won yourselves a(nother) free 4-pak, each!
As to what carriers to put them on, think 600 scale - for which your FireBrand will be only 10% oversized, and the above Wyvern - scaling out to 1/580 - only 4%! I have been thinking about how to come up with a 600-scale Cold War RN carrier for some time. I know at least one guy (Bobby O'Conner) who did, by "expanding" a 700-scale mold - or maybe it was mostly scratchbuilt, after all - and I've also thought it possible to cut down an Airfix Ark Royal into an Implacable-, or even Illustrious-class, postwar carrier. Also, the (1938) Ark Royal was built very much like the little Unicorn, the RN "aviation depot" carrier that in fact served as a light attack carrier, off Korea.
Of course, the Cold War flattop you really want is one of the many Collossus-class CVLs - and I was badgering OzMods (Greg Anderson) in Australia, ever since he announced he was going to copy his 700-scale mold of one, into 600 scale. He never made any (more) progress, however, and the last I heard, he handed it off to some guy(s) in Canada, who may or may not surface with the goods, one day.
If I ever do succeed in chopping up an Airfix Ark Royal - or even possibly a Victorious - and reassembling it into anything(s) useful, between 500- and 600 scale, I will definitely make a mold of it, as this is a (yet another) gaping hole in the selection of molds available.
Which brings us back again very close to the last, still-unnamed aircraft in the above design. Anybody care to guess again...?