Imho Gheist work great with All Stars, I can't really think of a leader that works great with mono-Gheist, I'd say Hugo is a good choice but I'd rather have a half deck Gheist together with the All Stars/Montana's/Uppers.
My half deck Gheist would be Wardom, Leviatonn, Bristone, Z3r0 D34d (13 Stars)
Which you could combine with All Stars --> Jessie, Robb, Randy, Striker or Marina
Montana --> Mona, Ottavia, Spiaghi, Edd or Donnie
Uppers --> Jackie, Zatman, Wendel, Oxen or Rubie.
And yes, the Uppers half deck ain't meant for Elo.
PS: I'm really not that good a player so don't take me too seriously, I tried to help the best I could though.