I grew up on FF. i could prattle on about them forever. not sure what my favourite would be off-hand. that would take some digging.
off-hand, i like stephen hand's work (Moonrunner, Legend of the Shadow Warriors, Dead of Night) paul mason's (Slaves of the Abyss, Black Vein Prophecy in particular). carl sargent could compose one hell of a straight-up sword and sorcery campaign. dont think he dropped the ball once.
i could go on about this subject for so, so long. i havent just got FF books knocking around, ive got Lone Wolf, a lot of random series that Mark Smith, Dave Morris and Jamie Thomson wrote. Ive got a lot of J.H. Brennan's stuff
I also adapted Jonathan Green's 'Howl of the Werewolf' as a campaign for my friends and wasted some of my best writing doing that. lol.
oh god, im starting to prattle already. this subject is near and dear to my heart.