Wellens was and is a Saints legend, and it's difficult to think of anyone who gave more for their club, from that GF where he got his cheekbone smashed early on in a typical act of bravery, to a derby game last year where he got a bad head knock in a tackle, staggered to his feet clearly not knowing where he was, but still threw himself into another tackle to stop Wigan breaking downfield. He really gave the impression that he'd literally be willing to die for the jersey - way more than anyone would have asked of him, and more than any other player I can think of. His emotional reaction to winning the GF last year after so many disappointments was one of RL's iconic images.
Wellens was never the flashiest player, but as a last line of defence was without equal for so many years. Ultimately he deserves to be remembered as probably the greatest clubman in RL, more so than, for example, Kevin Sinfield, which is not to underestimate Sir Kev's contribution to Leeds in any way.
Good luck and best wishes in your retirement Paul.