I am bias so here is my opinion on pra nangs that can't act or in general I just don't like them for some reason so it's also base on other factor beside poor acting.
Kong, Chakrit (his lakorns i can manage to watch some), Kelly, Vee (use to like him in Roong Thip), Poh (his lakorn are bearable for me to watch), Pong (hard to watch but i manage to complete very few of his lakorn), Brook (never like him and never will), Chatchai (he seriously need to retire, after his lakorn with Namfon i just want to vomit), oh there are so much more....
Kob S (don't like much of her millennium lakorns), Bee Makita (no comment), Poo (pretty but acting is a no no), Pang, Yard(just seen one of her lakorn and never watched another one again maybe after watching her lakorn with num i might change my mind), and so much more.
And the rest are okay for me just to watch but it doesn't mean they are good actors all the time.