I like the pothos going up the side like that, it can work well so long as you're willing to trim it. I have had mine in my tank for 2-3 years and have only cut it back twice. Whereas, I have one on my desk in my office that I trim every month. So you can try it and just see how much maintenance it will be.

I did just add some Ficus pumila to my tank in hopes that it climbs and sticks to the reptile carpet I have going up the back without me having to mount it or pin it down at all like I have to do with the pothos. That has small leaves though, not like the broad leaves of a pothos.

I'm sure others have even better rec's. I'm not very knowledgeable on terrarium plants and constantly pick everyone elses' brains.

It looks great though