One legged lat dumbbell row
I like my combination exercises. With time at a premium, my days of simple isolation exercises with lots of rest between them are long over. I like to do exercises that give you the most bang for your buck and this is one of them. Its a great lat exercise but its also a great core exercise and balance exercise at the same time! Three times the benefit in the same amount of time. You can do this exercise with a dumbbell or a kettlebell. Although this looks the same as a single arm dumbbell row for lats that you do on the workout bench, its much harder. I would suggest using about 60% of the weight that you can do on a bench.
The balance takes some practice, hang in there, you will get it after a few months. Remember use the weight for balance! You cant over-power a misplaced weight with the tiny stabilizing muscles in your ankle.