I like Tomasi a lot for his Green Lantern stuff and The Mighty. But I haven’t gotten to the Rebirth stuff yet. Might be next on the list.You might have already read them, but I absolutely loved the Rebirth era of Superman (and Action Comics). Definitely some of the most enjoyable Superman stories I'd read for a long time. Peter Tomasi is one of my fav comic writers and he didn't let me down with Superman.
Rebirth Superman is great, I second that.
I'll not keep my opinions on Grant Morrison to myself though, dude is a good writer