Tsukishiro Hakupo
>> Bi-pitch VCV - http://hakuapoid.iza-yoi.net/download.htm
>> Bi-pitch CV - (Made from the first sample of his VCV strings)
>> Bi-pitch Whisper VCV (? - I think it was bipitch)
Ruine Ameko, tripitch VCV
Fuuga Koto, tetrapitch VCV(kind of hard to find, she's got a bunch of other banks)
Shuga/Syuga Kanoko, two(at least, might be more) tripitch VCV
Yokune Ruko(f), tripitch CV(included in massive package with multiple appends and VCV, not sure if separate)
That's all I could think of that haven't already been mentioned.
I only know few multi-pitch voicebank :
-Marie Kagekine (but I don't know which VB(s) are multi-pitch)
-KEINE Tashi JPN Extend Power (VCV, 3 pitches) (and his ENG Extend Native with two pitches, but it's not released yet)
FEMALE:
Kumi Hitsuboku (6-pitch powerscale CV)
Alice Ouka -Burnet- (6-pitch powerscale VCV)
Alice Ouka -Snow-(?) (4-pitch whisper vcv)
Nao Katai (tripitch VCV and 4-pitch VCV powerscale)
Sora Denatsu RAGE (4-pitch VCV powerscale)
Nolae Kimochine (tripitch(?) VCV and 4-pitch VCV powerscale)
Akari Haneon (tripitch(?) VCV)
Loops (21-pitch VCV)
Ami Koharune (Has numerous multipitch voicebanks including 17-pitch VCV and 27(?)-pitch CV)
Lena Mizuki (Has numerous multipitch voicebanks. Main voicebank is 9-pitch VCV, appends are 4-pitch rentan/CV)
MALE:
Hakupo Tsukishiro (4-pitch shouting vcv)
Fin Kone (tripitch CVVC)
Lue Miyakone (4-pitch powerscale VCV)
NEUTRAL:
ORIGAMI-I (24-pitch whisper CV) (I count this voicebank as Neutral since it sounds female in the female octave and male in the male octave. It doesn't have a set design and is depicted as a piece of paper)
I'll add more later including the Kanji for the names (Since majority of these are UTAUs from Japan haha)