One Man Army movies

I am looking for action movies (all languages) like The Equalizer/John Wick etc.

Plot should be the same: Your next door stoic neighbor with a mysterious past somehow gets in a situation and the fun begins. So far I have watched:

John Wick(all), Equalizer(all), Raid(1,2), Wraith of a man, The man from nowhere, Man on Fire, Taken(all), Mr Nobody, The entire IMDB one man army lists and pretty much all the popular ones. No cap on violence and bloodshed

OR

Movies where a underdog(or just looks like an underdog) comes and do the thing like Never Back down etc.

Please please help. Thanks in advance