I think that generally its good to find a teacher who mainly plays jazz. They are usually the ones most capable to teach a variety of styles, because the knowledge you have to know to play jazz is more extensive than for other styles. A blues player can be great at blues, but he won't be able to teach you metal very well. A metal player can be great at metal, but he won't be able to teach you jazz. If you get a jazz teacher, you're more likely to get the theory and tools that will apply to whatever style you want to play.