May I add that wings attached with a negative dihedral not only effects roll characteristics in swept wing fighter aircraft but also directional stability. A fighter is a weapon platform. The 20 mm gatling gun with 6 revolving barrels is still one of the finest tools in strafing. This gun gained highest scores in F-104 fighters due to an
1)extraordinary directional stability (neg. dihedral, swept wing)
2)a remarkable roll stability(high T-tail and a fin underneath the fuselage).
Regards