Cable rows are good but I find that they would work rhomboids and traps due to the nature of the movement. If you really want to work lats like Heath suggests, nothing beats a good pre-exhaust with a set of pullovers driving with the elbows straight into palms up pulldowns.
I concurr, no elbow flexion (ie, pullovers) is the best, but, when speaking of rows, the most advantageous position is a cable or machine row as you have no need for stabilization from your lower body, which again, may or may not be what you want, for our purposes it mostly is.
"they would work rhomboids and traps due to the nature of the movement"
The nature of the movement is the same, unless we understand different things from cable rows.