Ghost types are my favorite type in general, but I agree with Baegal strategically, if you're going to have a team of one-type pokemon, normals or dragon are your best bet.
However, a team of Drifblim, Golurk, Chandelure, Jellicent, Sableye, and Shuppet (Would replace Shuppet with Gengar if I could get one {I only have Black}) works out pretty well unless your opponent has a decent amount of dark-and-ghost moves.
However, a team of Drifblim, Golurk, Chandelure, Jellicent, Sableye, and Shuppet (Would replace Shuppet with Gengar if I could get one {I only have Black}) works out pretty well unless your opponent has a decent amount of dark-and-ghost moves.