Gustav Leitner

Gustav Leitner is a guess who visits Talos I during Prey (2017).

Background
Gustav Leitner was a world famous pianist who visits Talos I in order to get treament for his disease. Dayo Igwe being a big fan of his music, meets Leitner and asked him to sign an album he'd brought.

Prey (2017)
After Igwe gets to Morgan's office he reveals that Leitner has died during the Typhon break out.