Recommendation?

What problems do you have currently?   Limnophilia sessiflora is an easy to keep fast growing plant and shouldn't provide too many challenges.

OK! I understand. Here are a few suggestions.

Anubias bateri: There are various forms of this ranging from 10-50 cm, Crinium calamistratum, Cryptocoryne crispulata, Echonidorous family has lots of suitable varieties, Rotala rotundifolia.

Try looking through the Tropica catalogue for some ideas.

The plant you have sort of grows out from the tips of it's shoots; It's generally called, for these purposes, a "stem" plant. They are generally used as a means of sucking the nitrates out your water column. This is good for you because it helps reduce the need for water changes. If you get rid of it, you would probably have to do more of these and I am not sure you would save a lot of time overall.  Perhaps you could look at some sort of "automatic" water change system. It would require some work to set up initially but...