a few mentioned that I have not seen ... the hard eight is on my list to look for now

As far as poker movies that you may have not seen ... I'd say Cincinnati Kid ... 60's Steven McQueen stud poker movie. Not great, not bad.

The Cincinnati Kid (1965) - IMDb

If you want a better 60's stud poker movie then Cool Hand Luke is what I'd recommend. Paul Newman

Cool Hand Luke (1967) - IMDb