JR is a great choice. But my favorite Vikings player will always be Alan Page.
Born and raised in the Bronx (as the son of Irish Catholic Immigrants), the 11th commandment was "thou shalt support the Notre Dame Fighting Irish".
Once he became a Viking, I was hooked. Loved watching the PPE in the snow every week on "This Is The NFL" highlight shows.
What the ORIGINAL AP (some fans still refer to Adrian Peterson as AP instead of his REAL moniker of AD), accomplished after his playing career is unrivaled by any other NFL player, IMO. A TRUE humanitarian and one who lets his actual accomplishments speak for themselves.
He was also the first defensive player to be named MVP. I think the only other was Lawrence Taylor, but I could be wrong.
Many other favorites, Moss, Browner, Foreman, Eller, Carter, Jordan, Millard, Randle, etc.
But Alan Page, for me, remains the ULTIMATE Viking for many reasons.