The lists of templates matching the above criteria, the Jython script I used to run the counts, and a pre-extracted set of templates for those of you who don't want to download a 2-gigabyte file just to get 9 megs of compressed templates are at http://leuksman.com/misc/templates/
-- brion vibber (brion @ pobox.com)
A quick view show several templates with a horrible markup syntax. They are not closed due to ignorance! Or you can see http://en.wikipedia.org/w/index.php?title=Template:History_of_China with left <tr> where its open and starts as a wiki table, then changes to html table and finsih with wiki again. Maybe someone html-only adding rows...
Some unsense notes: When i started, i prefered html tables as i understood them. Wiki table syntax is not as easy as writing text or formatting quotes. I have also seen people uploading tables as images. Html tables are also easy-copied from html-exporting programs.