Depends what is meant by "read". I've read about 25 complete runs, and bits and pieces of about another 25 (e.g. I dropped out of reading Saga after about a dozen issues, just not my thing.)
Actually think the list is very top heavy on American super hero comics. (Though I think John Ostrander ought to have something on it!).
I don't read particularly widely in comics...and even I can think of a fair bit of stuff that I enjoyed more than most of this list...e.g. Alan Moore's Future Shocks and Time Twisters from 2000AD, and a fair amount of Bryan Talbot's output such as Luther Arkwright, and Heart of Empire.