Genryūsai Shigekuni Yamamoto, Yoruichi Shihōin, Rōjūrō "Rose" Otoribashi, Retsu Unohana, Shinji Hirako, Seigen Suzunami (Game only character), Sōsuke Aizen, Ginrei Kuchiki, Love Aikawa, Shunsui Kyōraku, Kenpachi Kiganjō, Kenpachi Zaraki, Kirio Hikifune (never actualy appeared in the seires), Kisuke Urahara, Jūshirō Ukitake. In case you include the kidō corps, Tessai Tsukabishi never showed his bankai, shikai or general zanpakuto either.