I suggest using a super stable tripod with a really big ball head...so it's got the control for ultra fine adjustments. I personally prefer tripog legs that don't have a central column. The difference in stability is like night and day. The large ball head is essential too, there's nothing more frustrating than making a minute critical adjustment only to have the weight of the camera and lens slump on the ball and make a mess of the adjustment.
Other than that...shoot your composition a little looser than you need so you can keystone / correct in lightroom.
This images look fine to me. Sure there's a tiny amount of keystone on the top image...but it's far better than most images.