Normally you would expect the VMCG to be the most limiting since an engine failure when insufficient aerodynamic control could spell disaster. Your information reads 'might limit', however, these days it rarely is due to the design of the aircraft. The problem is that, at light weights, the aircraft could get airbourne at a speed when there is insufficient aerodynamic ability to control and engine failure and this airbourn speed could be below VMCG even. This situation can occur with some STOL type aircraft, particularly a stock aircraft modified for STOL. The engines are normally powerful, the high lift devices allow it to become airbourn before the capability of the rudder to control the engine failure.