Lamest of all time? I dunno man, but making comments like that I'd have to guess that you have not read too many comic books. There are some pretty lame heros, out there. I have always liked the characters of Matt Murdock and Daredevil.

Just to defend DD's honor and prove that there are worse heroes out there, let us take a look at,

The Legion of Super-Pets

http://www.comixconnection.com/uploaded_images/advsuperpets-787222.jpg

Arm-fall-off-boy

http://goodcomics.comicbookresources.com/wp-content/uploads/2007/10/armfalloff_001.jpg

The other boy wonder, Aqualad, is also incredibly lame. She-Hulk is kind of dumb too. I am only skimming the surface of lame heroes here, it gets so much worse than this.