For me, the most over-looked male character is Rygart Arrow from broken (break) blade OVA / series.
From the off-set you’d think he is a passive guy. And you’d be right in thinking that. However beneath that passive / inferiority complex, belies a young man with more depth than he lets on. In the broken blade universe people like him are generally seen as useless. However even the most useless person has some use. He defies that norm, and becomes a stand out character for me.