I would recommend La Gloria Cubana Serie R #6 or #7, preferrably in maduro. The 6x60 (#6) and the 7x58 (#7) will produce a huge volume of smoke. They also have a good med-full flavor that is rather complex. I've had some friends who prefer mild smokes truly enjoy them, so don't be afraid of the big ring guage.
Also, any of the Camacho 11/18 vitolas. They are all pretty full flavored, not for the faint of heart. Anyway, enjoy.
Well the ones I listed are on the full bodied side. The Bolivar Cofradia is full bodied whereas the Onyx Reserve is medium-full. I'm not so sure the strength of the cigars has such an influence on the smoke cause another one I've had with tons of smoke is the Romeo Y Julieta Vintage (glass tubed). It's more mild-medium but it let out tons of smoke.