I played in a league one year that required two starting quarterbacks because the commissioner wanted to see higher scores and more action.
No offense to any of you if you participate in a league like that, but that’s just stupid. One quarterback takes the snap in an NFL game; the same should be true for your fantasy football team.
Your basic starting lineup should consist of one quarterback, two running backs, two/three wide receivers, one tight end, one kicker, and one defense. Additionally, you can add one or two flex positions that only allow running backs, wide receivers, or tight ends.