Claremont’s Jean in UXM 125-131 will always be my favorite Jean. Morrison is a close second. Taylor and Percy are next for me. I hated the early 90s, but from X-Men 28 and onward both Nizieca and Lobdell often got her right. I liked Mark Waid’s Jean a lot. And both Joe Kelly and Steve Seagle wrote her really well - I still dream about their vision for Jean as Phoenix. I almost forgot Louise Simonson! Some of her work in X-Factor is classic.
Maaaaybe my top 5 is:
1. Claremont
2. Morrison
3. Percy/Taylor
4. Louise Simonson
5. Steve Seagle/Joe Kelly
Sometimes I really really really miss the classic thought bubbles.