This article pretty much speaks for itself.
1) Keith David in The Thing (1982)
His sexy voice helped him live (or eventually freeze to death) against impossible odds
2) LL Cool J in Deep Blue Sea
His parrot helped him defy impossible odds. Also the sharks were busy eating Samuel L. Jackson
3) Ving Rhames in Dawn of the Dead (2004)
An awesome shotgun and the heart of a badass lion helped him survive against impossible odds
4) Naomi Harris in 28 Days Later
Killing people with machete’s helped her survive against impossible odds
5) Ice Cube in Anaconda
“WHAT LIGHT ON YONDER WINDOW BREAKS?!” And I have no clue how Ice Cube survived this movie.
Pretty sure LL survived Halloween H2O as well.
Terry Alexander (John aka Flyboy) in Day of the Dead (1985)