Patriarch of Sodom, Gomorrah, and All Canaan (my favorite)
His Sacred Beatitude and Most Holy Eminence
His Sacred Beatitude
Most Illustrious Lord
His Whiteness (Celtic title, not supremacist!)
These are just a few. Unfortunately, it has been a while since I've read Anson. There are also your run of the mill Cardinals, but they have become an also-ran.
I also have mixed feelings about the title of monsignor. Traditionally, one would not use this title unless given some privilege by the Bishop of Rome or if one was a member of the Bourbon dynasty. Given its proximity to Papal privilege now, I personally prefer the title of Canon.
Feel free to add your own below!