Barbell and T-bar rows are great, but if you're also deadlifting and squatting, they can overwork the low back. Try this to give it a break.
Here's a great lat exercise that simulates the classic Nautilus pullover machine favored by golden-era bodybuilders.
Not using the GHR in your gym? You're missing out. It's a great knee-friendly, hip dominant movement.
Nail your rear delts with this face pull variation. If rear delts are a weak point, start your workouts with several sets of 12-15 reps.
Struggling with pull-ups? Do negative-only reps using a neutral grip. Once you can do a single, 30-second eccentric, you'll be able to do one good pull-up.