I know Egan spent a good deal of time near Medford, Oregon. Enough time, apparently, to be considered from the beaver state. His designs include Tualatin, as someone mentioned already, Eastmoreland, Medford CC (I think), Lake Oswego CC, of course the Pebble remodel and Indian Canyon, I think it is called, near Spokane, Washington.
Egan was a very good player for his day, winning tournaments and what not, but I know that doesn't really speak for his architectural style. So, I won't try and answer Gib's question.
I know that Tommy praises the Egan Tualatin CC, mentioning to me once that he thinks it has deteriorated a great deal over the years. I have played a lot of golf in Portland but never got inside the gates at Tualatin. If it is not the original Egan, though, who cares, right?? I wish someone had pictures.
I have played a lot of rounds at Eastmoreland. If that course is any indication of his work, or an accurate assessment of his "style," I would say he was good at using the land by not forcing the golf holes upon the landscape.
Beyond that, his stuff is ok.