Sure. Off the top of my head the ones I remember by Who & Who (back in the days they were called Remind production) are Mandee Yard Fah (this was co-produced by P'Mam and P'Kai), Prasat Meurd, Meun Kon La Fak Fah, Prissana, Jao Sao Kong Anon, Sai See Plerng, Tam Hua Jai Pai Sood Lah, Ruk Diew Kong Jenjira, See Pan Din, Wanida, Fai Luang, Rom Chat, Ruen Mayura, Rachinee Morlum etc. Basically a lot of Willy/Mew and Nok Chatchai's classics were produced by P'Kai.
I feel like Thong Entertinment is pretty much a branch of Lakorn Thai since Anne takes a lot of inspiration from P'Da and she normally uses P'Aew as her director. The foundations are pretty similar. Although her production is still new, most of her lakorns so far have garnered a lot of buzz so the Channel likely allows her some priority and leeway.
PJJ was really good. Nune and Aum probably wouldn't have been as recognized as they are today without Ah'Too since he's the mastermind behind their best hits. I don't know what happened to them after they left for Ch3. It's one thing that Ch3 doesn't give them access to the more popular actors or primetime slots but the plots they end up chosing are not that intriguing. Ah'Too did a lot of fantasy genres when he's better off with family dramas or revenge. If he picks something along the lines of Sood Kaen Saen Ruk, I'm sure it would be a hit with the right casting.
No Problem pretty much went downhill after falling into the koojin trap. Who would have thought that something good like Jao Sao Prissana and Song Naree, Phoo Yai Lee Gab Nang Ma shares the same producer as Leh Leh Sulab Rang? P'Mam surely needs to stay away from comedies for a while.
TV Scene used to be decent back in the days but now they're stuggling with the lack of good directors.
Maker Y is a hit or miss. Plerng Boon was a testament that if Khun Ja does adequate research, her lakorns can turn out good since she spent over 8 years on that remake. She's a better producer than her brother Jett for sure.
I forgot to mention that I also really like Good Feeling. In the recent years, their works have been really good with the help of a strong scripwriter like Num Ban Rai Gub Wahn Jai Hi So, Khun Chai Pawornruj and Padiwarada.
Then there's those in the middle: Maker J, Medta, Sonix Boom, Duang Malee Jun? (Tuk Jenjira's production), Cholumpi, Pood-Dern, Step Power 3
Then there's the ones that are just really bad: Guts Entertainment, Citizen Kane, Kantana Evolution/D-One TV, Akarapol, TV Thuner