*[[Lee Mars]] (1990-1991)
*[[James Woolley]] (1991–1994)
*[[Chris Vrenna]] (1988–19971988)
*[[Gary Talpas]] (1989) First live keyboardist on first Pretty Hate Machine tour, (only a few shows). He was replaced by Rushe on the subsequent tour. Also, the original NIN art director.
*[[Keith Hillebrandt]] (1998-2001) Studio member, song writing credits, was planned to be part of a multiple-keyboardist setup for the live band Trent originally planned. The Fragile took a different route sonically though, even after planning this and Keith didnt play live. However he did replace Clouser during the CRC sessions when the band played live in 2000. Was listed as full band member on the Afraid Of Americans remix along with Reznor, Lohner, Clouser and, Dave "Rave" Ogilvie.