Heretic of The Seventh Circle
Fair enoughPool of Radiance (Tarl), Avatar Series (Adon eventually, Fzoul), Year of the Rogue Dragon (Pavel), War of the Spider Queen (Several Drow), all showcase clerics who actively advocate the agenda of their gods. Special mention goes to Prince of Lies, where the entire plot revolves around a book that instantly turns you into a zealous worshiper of Cyric.
Of course, nobody wants to read about proselytizing clerics unless they are evil. So far more clerics are laid back, like Cadderly.
Did Crysania advocate for her god? I genuinely don't remember. Elistan did.