Arabic scientists:

Al-Hazen (965-1038)

Avicenna (980-1037)

Averroës (1125-1198)

Translators:

Gerard of Cremona (12th c.)

Michael Scot (13th c.)

Scholastics:

Albertus Magnus (c.1206- 1280)

St. Thomas Aquinas (1225-1274)

Experimentalists:

Robert Grosseteste (c.1168-1253)

Roger Bacon (c.1214-1294)

Pierre di Maricourt [Peter Perigrinus] (13th c.)

Oxford School:

John Duns Scotus (c.1266-1308)

William of Ockham (c.1284-1349)

Paris School:

Jean Buridan (c.1297-1358)

Nicolas Oresme (1320-1382)