Wow 4k posts and youre wondering if leg curls are good exercises. I suppose Dumbbell curls are broski exercises too.
Tuesday is hams/back for me, and in the routine, i can tell you that i do shitloads of leg curls, DB leg curls, and Romanian Deads with DB's.
Thursday is leg annihilation day, and leg estensions reign supreme for the teardrop or vastus. Insane amounts of heavy ass leg extensions.
Im up to 245 lbs at 13% bf too, bro.