A few other possibilities - Merlin Olsen, Eric Weddle. Julianne Hough also is/was mormon. I don't think someone needs to be devout to count, as long as they haven't renounced/changed religions or been excommunicated.
Please, don't call us "mormons", although I can see how saying members of the church of jesus christ of latter day saints could be difficult for a quiz.
I agree Mormons is inaccurate. Smithians would be better. And we ought to go back to Mohametans for "Muslims," this is also more accurate. Rastafarians is fine as is, no need to change to Rastafari. Christians... a bit borderline. Paulians would make more sense, but the Christian label fits as well.
fun fact: i know wilford brimley's cousin