I tend to use Ergotron arms for my monitors and pen displays.
Ergotron HX
Ergotron LX
For >=24" pen displays, I use the Ergotron HX. This is a very well designed and rugged arm. I use it with:
Wacom Cintiq Pro 27
Huion Kamvas 24 Pro 4K
Many 32" monitors
For ~22" pen displays I use the Ergotron LX. It's certainly not as rugged as the Ergotron HX, but it has been reliable and has a good range of motion.
The Ergotron HX has less wobble than the Ergotron LX, but still has some wobble.