by that I mean actually doing a good job at it
example: k0nan
bad example: mwzera
pure brainlessness. blocking vision makes them a controller? so i can run jett as a controller now? dont talk about watching games if you claim viper being used as a sentinel is just this guy, you've clearly never watched a viper player in your life. riot themselves have even stated that viper is intended to be a controller/ sentinel hybrid. yes she has smokes but they function in a different way to conventional smokers, and their use, on defense at least, is stopping and delaying pushes, just like sentinel utility. agent descriptions arent everything. sure theres the example of breeze and icebox solo viper, but thats just the controller aspects of her kit shining, she still plays like a sentinel on defense.
As an Indian we disown him. He's very naive and thinks viper is a controller because of the description of the agent. Viper is used as a sentinel and whoever doesn't know this doesn't know enough or is just dumb. His name is vct fan which is very ironic that he watches all the games yet fails to understand the essence.
I mean i understand what you're saying but sugyestu is more of an anchor player and as the meta is right now, he's the only anchor/sentinel player who's not shifted to chamber and has been doing very good. Viper played with solo controller is considered a controller whereas when it's a double controller then viper sides more to the sentinel side. He's amazing on all the sentinel roles(viper included).