Ehhh... there are tons of them... Note Ranma pilots in most but not all of them. Just a quick copy paste from my files:
AA threads:
R-AA 'Masu Ranma Half-Baked Thesis' by Shadowelf1 - [Dld Date=11/04/2008] - [Dld Size=89kb] - [Dld Files=5] - [Status=Inactive]
R-AA 'Ranma's New Fiancees' by Multiple - [Dld Date=03/14/2010] - [Dld Size=579kb] - [Dld Files=119] - [Status=Not Complete]
R-AA 'Switching Places-Eva' by Multiple - [Dld Date=12/31/2010] - [Dld Size=769kb] - [Dld Files=105] - [Status=Not Complete]
R-AA 'Switching Places-Eva-Switcheroo' by Linnara - [Dld Date=03/02/2007] - [Dld Size=113kb] - [Dld Files=18] - [Status=Inactive]
Multicrosses
R-MULTI 'Just won't die' by Jeffrey OneShot Wong - [Dld Date=05/31/2006] - [Dld Size=14776kb] - [Dld Files=33] - [Status=Inactive]
R-MULTI 'Sic Semper Morituri' by Daniel Jess Gibson - [Dld Date=08/16/2010] - [Dld Size=7151kb] - [Dld Files=61] - [Status=Not Complete]
Direct crossovers
R-NGE 'A Better Future' by James Lee-Bloody Paintbrush - [Dld Date=04/09/2001] - [Dld Size=74kb] - [Dld Files=6] - [Status=Inactive]
R-NGE 'A Couple of Angels' by Corwin - [Dld Date=10/18/2001] - [Dld Size=556kb] - [Dld Files=23] - [Status=Inactive]
R-NGE 'Alternate Future' by James Lee-Bloody Paintbrush - [Dld Date=05/05/2003] - [Dld Size=479kb] - [Dld Files=15] - [Status=Inactive]
R-NGE 'Angel halflings' by happosai - [Dld Date=05/25/2004] - [Dld Size=139kb] - [Dld Files=14] - [Status=Inactive]
R-NGE 'Chaos Eva Pilot' by Materia-Blade - [Dld Date=01/31/2004] - [Dld Size=47kb] - [Dld Files=4] - [Status=Inactive]
R-NGE 'Death Becomes Her' by E-Type - [Dld Date=01/21/2004] - [Dld Size=396kb] - [Dld Files=5] - [Status=Inactive]
R-NGE 'Duality' by Innortal - [Dld Date=11/18/2005] - [Dld Size=57kb] - [Dld Files=3] - [Status=Inactive]
R-NGE 'Evangelical History' by SKaiton - [Dld Date=09/20/2009] - [Dld Size=188kb] - [Dld Files=8] - [Status=Inactive]
R-NGE 'Evangelion 12' by SJiriki - [Dld Date=10/18/2003] - [Dld Size=254kb] - [Status=Complete]
R-NGE 'Evangelion Heart of a Warrior' by Demon Eyes Laharl - [Dld Date=08/21/2009] - [Dld Size=315kb] - [Dld Files=9] - [Status=Inactive]
R-NGE 'For the Sake of the Children' by Deranged Otaku - [Dld Date=03/12/2000] - [Dld Size=216kb] - [Status=Inactive]
R-NGE 'Heavens Judgement Error' by Shai 'Halud - [Dld Date=11/07/2004] - [Dld Size=33kb] - [Dld Files=3] - [Status=Inactive]
R-NGE 'Hunt for the Two' by Montymouse - [Dld Date=01/11/2005] - [Dld Size=71kb] - [Dld Files=3] - [Status=Inactive]
R-NGE 'Kind Angel's Thesis' by Fire - [Dld Date=05/17/2001] - [Dld Size=454kb] - [Dld Files=7] - [Status=Inactive]
R-NGE 'Neon Genesis Evangelion Honor's Duty' by JJ Corley - [Dld Date=12/26/2003] - [Dld Size=451kb] - [Dld Files=8] - [Status=Inactive]
R-NGE 'NGE Angel of light' by weebee - [Dld Date=03/19/2009] - [Dld Size=798kb] - [Dld Files=52] - [Status=Complete]
R-NGE 'Order of Command' by Daisensei Ben - [Dld Date=07/05/2005] - [Dld Size=62kb] - [Dld Files=3] - [Status=Inactive]
R-NGE 'Past Future' by Long Ngo - [Dld Date=01/26/2002] - [Dld Size=341kb] - [Dld Files=17] - [Status=Complete]
R-NGE 'Pity to the Angels' by Laqjr - [Dld Date=07/28/2005] - [Dld Size=24kb] - [Dld Files=2] - [Status=Inactive]
R-NGE 'Ranma's second chance'-'Neon Ranma Gen' by DarkVortex - [Dld Date=12/23/2001] - [Dld Size=504kb] - [Dld Files=20] - [Status=Inactive]
R-NGE 'Saotome Shinji Final Duty' by Cloud Dancer1014 - [Dld Date=07/02/2010] - [Dld Size=68kb] - [Dld Files=2] - [Status=Not Complete]
R-NGE 'Screams and shells' by maroonblackblood - [Dld Date=11/17/2004] - [Dld Size=9kb] - [Status=Inactive]
R-NGE 'Shinji Saotome' by mastermage - [Dld Date=01/29/2008] - [Dld Size=599kb] - [Dld Files=17] - [Status=Complete]
R-NGE 'Six' by Chendo - [Dld Date=02/11/2002] - [Dld Size=146kb] - [Status=Unknown]
R-NGE 'Spinal Injection' by James Thomas - [Dld Date=11/19/2008] - [Dld Size=768kb] - [Dld Files=15] - [Status=Complete]
R-NGE 'Synesthesia' by JonaBee - [Dld Date=01/13/2011] - [Dld Size=73kb] - [Dld Files=3] - [Status=Not Complete]
R-NGE 'The Picture of the Tragic Hero' by Andrew Aelfwine - [Dld Date=08/11/2007] - [Dld Size=69kb] - [Dld Files=2] - [Status=Inactive]
R-NGE 'The Wild Horse Thesis' by Calamity-Queen of Cordite - [Dld Date=08/30/2006] - [Dld Size=596kb] - [Dld Files=18] - [Status=Complete]
R-NGE 'Tides' by Bain - [Dld Date=09/20/2004] - [Dld Size=30kb] - [Dld Files=2] - [Status=Inactive]
R-NGE 'Wolf In Sheep's Clothing' by juandelacruz - [Dld Date=08/13/2005] - [Dld Size=220kb] - [Dld Files=3] - [Status=Inactive]
Runner ups:
Not strictly a Ranma cross as a multicross involving Shinji and Ranma, until the last arc, they had no interaction.
R-MULTI 'Not Another SI Fic' by Enigmatic Magus-T Kagato - [Dld Date=12/20/2009] - [Dld Size=1501kb] - [Dld Files=56] - [Status=Inactive]
Only in a couple dozen scattered among 649 snippets are they together or referenced:
R-MULTI 'Pigtailed Time Loops' by Multiple - [Dld Date=01/03/2011] - [Dld Size=2434kb] - [Dld Files=649] - [Status=Not Complete]
No Ranma, Ranma's spirit is sort of Shinji
R-MULTI 'Spirit within Saga' by ContraBardus-Carrotglace - [Dld Date=01/04/2007] - [Dld Size=336kb] - [Dld Files=11] - [Status=Complete]
EDIT: I listed ones you mentioned already deliberately, due to an instance in the past where I was asked to do so in a different search thread. Will remove upon request.