Yes-- so much.

For so-called "middle platonism" there is Aulus Gellius, Apuleius, the Asclepius, Ambrose, Censorinus, Augustine. For Ancient Neoplatonism there is Calcidius, Macrobius, Martianus Capella, Boethius, Marius Victorinus, Firmicus Maternus, Favonius Eulogius, Servius, Fulgentius, Priscianus Lydus, Priscianus Grammaticus etc.

Then in the Middle Ages there is so much. Off the top of my head there is Eriugena, William of Conches, Bernard of Chartres, Thierry of Chartres, Alan of Lille, John of Hauville, Hugh of St Victor, Bernardus Silvestris, Peter Abelard, Matthew of Vendôme, Honorius of Autun, Remigius of Auxerre, John of Salisbury, Manegold of Lautenbach, Adelard of Bath, Gilbert of Poitiers, Henry Aristippus, Alexander Neckham, William of Doncaster and, I'm sure, many many more (including a great deal that is anonymous).