Most of those IMDB or AFI lists aren't blockbusters though. If you want to talk about movies you haven't seen the Box Office Mojo all time list or adjusted list are what really matter.
https://www.boxofficemojo.com/chart/..._gross_to=2020
I've seen probably around 90 of the top 100 of the adjusted list. Got to be more like 95 of the top 100 all time non adjusted (either domestic or worldwide). Only a few of the fairly recent children's movies I haven't seen.