there are a few members that have been successfull keeping plecos in their cichlid set ups. I would go with bigger ones though. Flowerhorns are pretty large ( not sure how big the jaguars and the texas's get) so i would go with something bigger. If you told us your aquarium size we might be able to give you suggestions on certain types of plecos that will do well in your aquarium.
Also, here is a very helpful website that has helped others, so it might help you.
www.planetcatfish.com
good luck! this website has a lot of info on catfish ( plecos included)