i dont have experience on them
but in my head I'd think playing kayo and viper would be absolute pain considering you have to get your ranked teammates to coordinate with you
cypher (literally easy kill with trap and big info on cam, one of my most used agent now after hiatus for 2 yrs )
Reyna before nerfed can overheal many times, i dont like new reyna
Chamber before nerfed ( 2 tp), very OP & simple. His ult also reload faster than operator which is very good. There are days when teams can easily predict whose gonna win the match based on who have the better chamber at the time
Jett before nerfed (instan dash), i cant described how amazing she is before the nerfed, shes the most fun agent to play. very sliperry and its easy to get 20 kills with her. I dont like the new one since im not too deep into developing my games (only peak dia 1 before they announced asc) and kinda wasted my dash most of times now so its hard for me to enjoy her anymore