Pistol Squats with support can effectively strengthen your thighs and glutes.
Single exercises: glutes
handles: upper pulley, seat: knees
This is basic exercise for correct pelvic position. You will involve buttocks and hamstrings in the exercise when you put your feet into the seat.
XUP Reverse lunges are effective and complex exercise on their own. In addition, when you put one leg into the seat, it is even more efficient and you will use your deep stabilization system.
Rowing with single leg workout will strenghten your back, glut and hamstrings at the same time.