What does "full body" mean to you?
Each different cultivar will exhibit a particular mouthfeel. Itcan be either enhanced or destroyed by improper roasting or brewing.
So it depends on the beans you roast, how you roast them (specific roast profile), and how you brew. A method such as French Press, retains more of the fatty oils, and can create more body, or mouthfeel, in the cup if that is what you like. As I mentioned in the beginning, even when doing a cupping so all of the coffees are on a level playing field, each coffee will have a different kind of texture to it.
It may be you need to explore a lot more coffees.