Anubias barteri is a great centerpiece low light plant IMO
. Definately not as eye-catching as a lotus or other colorful plant but the anubias will probably never need trimming, very sturdy, and provide a lot of hiding places for fish/inverts. I'm actually setting up a 10gallon dwarf puffer tank and will be taking my huge anubias out of my 20 gallon and putting it as the centerpiece in my 10 gallon. It should take up a good 1/2-3/4 of the tank and provide a maintainence free setup (my favorite kind).
The anubias I'll be transferring I first put in my tank last Feb/Mar. It was about 2" long with 3 leaves when purchased. I split it once about 6 months ago and that piece is about 4" long. The large piece is probably ~10-12" but has split into 3 or 4 different "arms" and so has a unique shape that should spread throughout the tank well once transplanted. So in the 16-18 months I've had it I have yet to trim it (other then removing some leaves that were algae covered). Try that with some hygro!