Well yeah if we're going to compare career totals for a guy that blew his ACL in Week 1 of Year 4 and was clearly never the same again. I think your post implies that he didn't live up to being drafted #20, which is a bit obtuse to me as he ascended every year in the league, topped out in his 3rd year as one of the top 5 best WRs in the league and then blew out his ACL. For my money, he was a much better, more talented player than Donald Driver.
Walker was a prototype #1 you build an offense around; Driver was usually not even the best WR on the team unless the team was very bad. IMO, Walker was the most gifted WR the Packers have had between Sterling Sharpe and Davante Adams. I wouldn't argue with anyone claiming Jordy, but Walker was that level of talent.
If we're taking a snapshot of his career stats, Bill Schroeder was better. I love DD before the mob comes for me, but his trademark was always grit and longevity and toughness. But he was never a true superstar.