I thought of Larry Allen as the the line of demarcation between the old-school offensive lineman and what would be the the modern day offensive lineman. Those guys from the 60s, 70s, 80s and into the 90s were these extremely tough men that generally had freakish raw strength that really couldn't be judged by bench pressing. They had the strength to move human weight that was uneven and fought back that either came genetically or threw real labor and determination. Allen had both that sort of old "grown man" or "country-style" strength AND he was ridiculously strong in the weight room that we judge modern-day strength by. I think he benched over 680 pounds or something like that, which is mind boggling.
Top 5 OL of all trime I'd say and top five guy I'd want having my back if I had to walk down a dark alley in the wrong part of town.