In the modern era, there have been 20 WR's inducted to the Pro Football Hall of Fame. 17 of those WR's listed below have numbers that I believe will be similar to Steve Smith by the time his career is over. The players in bold are the players I'm absolutely positive Steve Smith will surpass in the next couple of years.
Steve Smith: 574 rec, 8,330 yards, 58 TD's (50 TD's receiving)
Lance Alworth: 542 rec, 10,266 yards, 85 TD's
Elroy Hirsch: 387 rec, 7029 yards, 60 TD's
James Lof