Royals will eat your plants.
Sunshine, really any of the Scobinancistrus are great. Plants will be safe, though they do dig. If you're only attaching plants to the wood, should be fine.
I've had several L095 which aren't very common and are AMAZING. Very peaceful and slow moving, do well in groups. Probably my favorite pleco I've owned.
I can't say if they'd eat your plants or not but if you're going with things like Java or Anubis, you should be OK.
If you definitely want plant friendly and showy, go for some nice Pseudacanthicus.
And then there's Luteus...
With a tank that size, if you've doing a sand bottom you should also look at some of the odder whiptails too. A group of true Chameleon or Spoon face would be another nice addition.