You're right October 1394, his scenes are rather dramatic in the context of gis crying but some of them there are also somehow funny and off beat. Think about the first scene were he's schoomzing the professor and begging in a very funny way and then that tearing up which adds dramatism. Or the last scene where he says ''fuck you'' , it's very comic but his voice betrays saddnes or anguish.
I also at one time read on the net an article where he says he's a natural crier and a very heavy one.During one interview he managed to sob two times because he was ill and the media thought it unprofessional for him to miss work because of that..He's certainly a maverick.
I can't wait right now the second season from Mr. Selfridge. He cries in that as well..

Jeremy Piven has two very brief crying scenes in Last Call when his character is mourning the death of his mother. https://2kmovie.cc/watch-movie/watch-last-call-free-68691.4799362 ( the crying is somewhat subdued to some extent). Pause at 10:41 and at  28:50..