I think Lesser makes gorgeous GHI combos so either or both of those would be good pairings. Clown or Ghost might be cool to work into your lines, but it would be slow going since he isn't het for either. Ghost GHI Lessers or Mojaves are some of the coolest looking Ghosts I've ever seen and I wasn't really even interested in Ghost till I saw them. Enchi is pretty much a must have morph for me in most projects, and it does wonders with GHI. Mahogany GHI are incredible, and if you like really dark BPs, that might be a fun route.
Hope that gives you some ideas to look at different combos and see if any inspire youGood luck!