Tank Abbott, because Tank got duped in UFC due to fake fixed fights and never won a UFC belt, so sad. UFC 6 he was on fire, and made it to the finals, but Oleg Taktarov had a free pass to the final and was fresh, because his fight with Anthony Macias was fixed and a work. Then at UFC Ultimate Ultimate 96 Tank again was on fire, making it to the finals, but Don Frye had a fixed fake fight with Mark Hall, so Frye was fresh for the final, shameful stuff.
Tank should have got the belt twice but was cheated in unbelieve circumstances