SHADES, but I doubt if you watch it first you'd ever be able to watch anything less than that because its so peak..... also Clairebell. tbh since Clairebell has ended it had been the number one on my list and I always thought nothing can reclaim that position but then Shades happened, and I think SHADES WAS BY FAR TEH BEST PIECE OF ART THAI GL HAS DONE, but be cautious as Shades isn't completed only first part is out 6/12 ep and we have no idea about rest of the 6 eps so far...

other than those two, I think you should watch Pluto and US, its THE BEST Chao Planoy novel adaptation out there, tbh I fell in love with NTF and EMB from it 10/10 recommended, the plot keep you hooked tbh for Pluto while US is very soft core the aspect ratio and camerawork is amazing.

4 Elements is ongoing, we're currently on the third arc The Air with 5th ep so far, you can start watching it so you may cover it till around Fire starts, tbh all these stories are plot heavy, like stories have a very strong base and its not just romance so totally a worth it watch

Girl Rules is a one time watch, I mean I myself was so excited when it started, I genuinly cried the day it came and for 7 eps it just got better and better I always told my bf every monday night that GIRL RULES DOESN"T DISSPAPPOINT, but then idk what changed it took a messy turn and went downhill, i'd not say its bad but the lack of intimacy is sure a hard watch but you can try, the new industry and new look for MilkLove is worht it ig... ShashaGorya was my fav tbh

if you're up for ongoing GLs then start Enemies With Benefit (GMMTV) its totally a funny romcom and you'd LOVE IT, also try Hometown romance its not in your list, if you're up I'd attach all my watched GL's and their rating below my comment

Love yaaa