<img class="alignleft size-full wp-image-119894" src="http://www.eoghann.com/wp-content/uploads/2014/08/the_thing_vs_hulk_by_uncannyknack-d7u0s7h.jpg" alt="the_thing_vs_hulk_by_uncannyknack-d7u0s7h" width="675" height="1200" data-wp-pid="119894" />Perhaps one of the longest running rivalries in Marvel Comics… in superhero comics as a whole, is The Incredible Hulk vs. The Thing. Going all the way back to Fantastic Four #12 and perhaps more significantly their full on battle in Fantastic Four #25. Hulk is clearly the stronger of the two (by a log way) although Thing has never quite been prepared to admit that fact.
This artwork by uncannyknack shows the two titans going one on one right in the middle of a city and while they're both in good shape, everything else is collapsing around them.
Remarkably this powerful art is billed as a work in progress.
Source: DeviantArt — TheThing vs. Hulk