Fuck, Kalos and ORAS Hoenn made me like multople trainers of both genders so muh that I can't even decide. Probably Fisherman, Male.Breeder, both Ace Trainers, Parasol Lady, both Swimmers, Ninja Boy, female Pokefan, PicNi Girl and Poke Scout, Bird Keeper, Delinquent and Street Thug all run for the top of tops.
Shittiest are most likely Beauty and Triathlete updated versions, also for the lack of female counterparts. The Magma Grunts could have been better without Looker's copypasted face.
The rest of the trainers are just neutrally good.