In this recent post on naval losses, I pointed out that only one crew member of U-374 and U-451 each survived. The excellent U-Boat Archive site has the interrogation reports online. The Internet is amazing. I hope the owner of the site also has access to the reports of survivors of U-75 and U-79.
U-374 – sunk by HM/Sub Unbeaten off Cape Spartivento, Italy, report on interrogation of sole survivor
U-451 – sunk by Swordfish of No. 812 Squadron FAA, Gibraltar, report on interrogation of sole survivor