Keisuke Sannan from Hakuōki: Shinsengumi Kitan
Keisuke Yamanami from PeaceMaker Kurogane
Both are actually based on the same historical person and it seems like, so far, that every interpretation I've seen of this shinsengumi member is sporting glasses.
Masamune Date - Sengoku Basara
*~Next con I'm attending~*
FIN Chibicon (9 November 2013)
SAT Ryūnosuke Ibuki - Hakuōki: Shinsengumi Kitan