This old school exercise hits the lats especially hard and minimizes bicep involvement. Try adding weight with a pull-up belt as you get stronger.
Pendlay Row
In a bent over position, grab the bar and pull it up to the upper abs. Keep your knees bent and hip angle locked in, and pause before lowering the bar.
Straight-Arm Lat Pushdown
Grab the straight bar attachment with both hands, palms facing the floor. Push your hands down in a sweeping arc motion, taking care to really emphasize the lats doing the work.
V-Bar Sternum Pull-Up
Vince Gironda inspired this variation of the pull-up exercise, where you hang from a v-bar attachment and pull yourself up so that the v-bar touches your sternum.
One-Arm Lat Pulldown
Working one side at a time on the lat pulldown machine will increase muscle mass and muscular balance.