A question regarding Jeopardy!: Is there a list of 5 day winners and beyond, showing the highest amount won at 5 day, at 6 day, etc.. (pre and post Ken Jennings)? Is there a site with this info, along with highest one day (besides the $75,000 day of KJ)?

The Jeopardy! website has a top winners list. The "top 5 day total" depends on whether you halve the total of post-doubling contenders or not. Plug the names into j-archive.com, and you're off and running.

To answer your last question, the $52,000 Brian Weikle won on his third day is the top non-Jennings total, and $34,000 by Jerome Vered the top pre-doubling. (Ken scored $52,000 or more on five different occasions.)