Flight controller choosing

Hi everyone
i have a problem with choosing flight controller
how do i know which flight controller is using that suitable for plane?
plz give me a suggestion or any decument
Thank you

All supported Flight Controllers can run Arducopter, Arduplane or Ardurover. Select one with enough outputs for the craft.

Supported FC’s

If cost isn’t a huge concern, the boards using F7 and H7 processors have greater flexibility due to their ability to invert any of the inputs. Also, 2MB of flash is required to get support for all of the features of Arduplane (but it works fine with less if you don’t need those features).

for example if will built big plane about 8 m wing leghthwith gasoline engine; which flight controller should i use ?