Those five are on the evaluation episode airing now. Touched by an Angel knew how to get big name guest stars.

I have seasons 8 & 9 on DVD. Here's a list of people who guested those seasons that had sitcom success (may not be complete, might leaving some out?)

- Kirk Cameron
- Peter Scolari
- Hal Linden
- Leila Kenzle
- Phylicia Rashad
- Tom Bosley
- Neil Patrick Harris
- Doris Roberts
- Sarah Hyland
- Patty Duke
- Marion Ross
- David Ogden Stiers

And of course the person who had success with One Day At A Time and Hot In Cleveland is in most of those episodes.

With the help of Wikipedia episode guide for seasons 8 & 9 I'll add

- Robert Pastorelli
- Grant Shaud
- Charles Shaughnessy
- Kenneth Tigar (lots of sitcom guest spots)
- Wendie Jo Sperber
- Ethan Phillps
- Alex Rocco

I just came across that Bonnie Franklin was on a season 7 episode. Which put her on the show about 8 months before her former TV daughter showed up and became a regular for 2 seasons.