Question about jaw fish

[kuatto]

After the 20 gal(20high) is all set up and ready to stock,I was thinking about getting a jawfish.I was ready that its best to put them in first to allow them to set up home before any other fish can bother them.The bottom will have a mix of fine sand,crush coral and small rubble.
Any thoughts on which jaw fish to choose?I was thinking on a yellow headed jaw fish.