A couple of the ones I like are BB Rows, great for adding mass. T-Bar rows are great as well.

In addition to rows, pullups are along the same lines as a lat pull down, but better in my opinion.

Finally, another great option is to do dumbell pullovers on a decline bench.....nice stretch, nice burn.

Finally, the mother of all back/total body development are deadlifts. These must be added to your routine at some point.