We don't mean the person who has received the most individual nominations (that would be Rosalind Russell, with 13 individual nominations). We're looking for the person who has appeared in the most films that have received at least one Cosmo nomination, even if the nomination wasn't for that actor. (Could be an actress who appeared in a film whose sole nomination was for Actor's Character You Most Would Like to be Intimate With.)
The answer is ... Ian Holm!
Ian Holm's sole nomination (and win) was for Best Villain for his appearance in From Hell (2001). But he has appeared in a total of 13 movies that have received Cosmo nods, including, in chronological order of film's release:
- Alien (1979)
- Brazil (1985)
- The Fifth Element (1997)
- eXistenZ (1999)
- From Hell (2001)
- The Lord of the Rings: The Fellowship of the Ring (2001)
- The Lord of the Rings: The Two Towers (2002)
- The Lord of the Rings: The Return of the King (2003)
- The Aviator (2004)
- The Day After Tomorrow (2004)
- Garden State (2004)
- The Cabin in the Woods (2012)
- The Hobbit: An Unexpected Journey (2012)
It's unclear whether he will be in the upcoming The Hobbit: The Desolation of Smaug (IMDB lists him but Rotten Tomatoes does not), but it seems like that he will be in next year's The Hobbit: There and Back Again.
Ian's 13 nominations are followed by Helena Bonham Carter and Jude Law, who have each appeared in 12 Cosmo-nominated films, and then by Alec Baldwin, Anne Hathaway, Cate Blanchett, Jim Broadbent, Johnny Depp, and Judi Dench, who have all appeared in 11 Cosmo-nominated films.