According to the KNS, not very [1]:

Three state legislators sponsored no bills that successfully passed during the 105th General Assembly. They were Reps. Stacey Campfield, R-Knoxville, Frank Niceley, R-Strawberry Plains, and Parkey Strader, R-Knoxville. All represent parts of Knox County.

According to the article, Campfield has not sponsored a single bill that passed during his entire three terms. We'll always have mixed martial arts, though.

(Unfortunately, Democrats are not running candidates in any of these districts. Guess they are satisfied with do-nothing representation.)