The main figures of scholasticism were Peter Abelard , Albertus Magnus , Duns Scotus , William of Ockham , Bonaventure and , most importantly , Thomas Aquinas . The main figures of scholasticism were Anselm of Canterbury , Peter Abelard , Albertus Magnus , Duns Scotus , William of Ockham , Bonaventure and Thomas Aquinas .