When you think of consistency and a team that always seems to overachieve every year, once of the first teams that may come to mind are the Oregon State Beavers. The Beavers always seem to play everyone close, despite not having the top rated athletes that say a rival USC or UCLA would get.
This hasn't slowed down Oregon State in the past and in fact, it has actually provided extra motivation which has allowed them to notch multiple shocking upsets over the past 15 years.