There are a lot of different kinds of anubias but the nanas tend to stay quite small and will cover the bottom of the tank nicely.
Marinemom
Here's its current state, planted with a few anubias (some nana, some barteri barteri), low foreground plants (I think they're dwarf sag but I don't remember), and fish (1 honey gourami in hiding, 7 cardinal tetras, 3 otocinclus).