Who are the 4 Pillars of GL?

I learned from my brother that there is what is called "The Four Pillars" of BL tho I think that is only in GMMTV. If GL has something similar, who do you think should be included (not exclusive to GMMTV)? Who made the biggest impacts and have the biggest fanbases?

Imo, it is FreenBecky, NamtanFilm, MilkLove, and I'm torn between LingOrm and FayeYoko as the 4th one but leaning towards LingOrm.