Bella Hardy accompanies herself on her fiddle. When I saw her she was mainly playing a drone which became a bit monotonous, but I imagine she has developed her technique somewhat since then as it was about 3 years ago.

Can you get your fiddler to try some double stopping - you can then get a more chordal accompaniment. Also how about playing pizzicato for a more subtle effect. I remember seeing one fiddler - I can't remember who now - turn his fiddle round and play it like a guitar when accompanying a song.