he had more years then some of those guys over the course of his entire career, that doesn't mean he was a better RB than they were in prime for prime. Again, Emmit Smith has the most rushing yards EVER, that doesn't mean he's the best RB! Just means he had a great offensive line.
All of those guys I listed I would pick over Curtis Martin. All of them. Martin is like a shaun alexander with a couple more moves. Good, dependable, but nothing spectacular.