Even if you don't like them, squats and lunges work all kinds of auxiliary muscles, these are very important. Start with low weight, and work your way up. Even low weight will start to burn faster than you would think. Almost like an aerobic workout. Use a self-spotting rack, or start with a Smith press bar for squats (but don't stay with it for long). Lunges with a bar or with dumbbells will do wonders.

I don't get a chance to do much lifting these days, but back in the day I used to rotate between quads and hammys during my leg workouts, with calf work in between. So a typical workout would be squats, calf raises, leg curls, leg extensions, calf raises, leg curls, leg press, calf raises, leg curls, lunges, followed by cursing every stairwell between the gym and my beer. Switch around the various calf raise exercises (seated, donkey, etc.) and leg curls (dual vs one leg, seated vs standing). Leg extensions are overrated, I think, and I'm not sure they are really good for the knee joint.