@melbisbelbis the Living Saint trope is a thing. Even ignoring that, people have been considered living saints irl (see Mother Teresa, who was widely considered a living saint before her death). This does ignore the will of the church of whichever religion the setting has, which brings up the idea that a fantasy religion in a fantasy setting might very well officially have actual living saints.
So I think that, unless it's an actual real world setting, anyone who seriously thinks it's inaccurate to have living saints is a bit of a twit.
