Over whether you take a great running back as the Giants did when there are QB's sat there and you have a declining ageing QB at the help.
Jemack mentioned Marino as being a great QB who never won a ring, which of course is true, but almost all the great QB;s win Super Bowls when that isn't even close to being true for RB's.
Since Marino went to the Super Bowl in 84 here is a list of the league rushers by year and how many rings they won.
Obviously some people are repeated, but in 33-years only 3 different players have won Super Bowls.
Simply put, a great back doesn't lift a team with a mediocre QB, but a great QB will lift a mediocre team.
2017 Kareem Hunt (22) 1,327 KAN - NO RING
2016 Ezekiel Elliott (21) 1,631 DAL - NO RING
2015 Adrian Peterson (30) 1,485 MIN - NO RING
2014 DeMarco Murray (26) 1,845 DAL - NO RING
2013 LeSean McCoy (25) 1,607 PHI - NO RING
2012 Adrian Peterson (27) 2,097 MIN - NO RING
2011 Maurice Jones-Drew (26) 1,606 JAX - NO RING
2010 Arian Foster (24) 1,616 HOU - NO RING
2009 Chris Johnson (23) 2,006 TEN - NO RING
2008 Adrian Peterson (23) 1,760 MIN - NO RING
2007 LDT(28) 1,474 SDG - NO RING
2006 LDT (27) 1,815 SDG - NO RING
2005 Shaun Alexander (28) 1,880 SEA - NO RING
2004 Curtis Martin+ (31) 1,697 NYJ - NO RING
2003 Jamal Lewis (24) 2,066 BAL - 1 ring
2002 Ricky Williams (25) 1,853 MIA - NO RING
2001 Priest Holmes (27) 1,555 KAN - NO RING
2000 Edgerrin James (22) 1,709 IND - NO RING
1999 Edgerrin James (21) 1,553 IND - NO RING
1998 Terrell Davis+ (25) 2,008 DEN - 2 rings
1997 Barry Sanders+ (29) 2,053 DET - NO RING
1996 Barry Sanders+ (28) 1,553 DET - NO RING
1995 Emmitt Smith+ (26) 1,773 DAL - 3 rings
1994 Barry Sanders+ (26) 1,883 DET - NO RING
1993 Emmitt Smith+ (24) 1,486 DAL - 3 rings
1992 Emmitt Smith+ (23) 1,713 DAL - 3 rings
1991 Emmitt Smith+ (22) 1,563 DAL - 3 rings
1990 Barry Sanders+ (22) 1,304 DET - NO RING
1989 Christian Okoye (28) 1,480 KAN - NO RING
1988 Eric Dickerson+ (28) 1,659 IND - NO RING
1987 Charles White (29) 1,374 RAM - NO RING
1986 Eric Dickerson+ (26) 1,821 RAM - NO RING
1985 Marcus Allen+ (25) 1,759 RAI - 1 ring
There is nothing either good or bad, but thinking makes it so.
