Don't relate the aerodynamic configurations of full-scales which have to meet vastly different criteria for performance to most model sport flying!
There just isn't a 1:1 correspondence!
The anhedral on the F-4 -AND- the tip dihedral -AND- the motor location -AND- the need to land on a carrier-AND- the Mach 0.2 to Mach 2.0 flight regime dictate that unique shape.
A model of an F-4 doesn't need any of those aerodynamic things to fly within its limited flight regime.