I really like the Spurs and love to watch them play, but I really wouldn't think of them as "big name" players other than Tim Duncan. Yes, they are consistent. Yes, Tim Duncan is arguably the greatest PF of all time. Yes, they won championships. But that doesn't mean that they are big names.
Seems odd, but think about it. Tony Parker is among the most consistent PGs in the game, but rarely is able to crack the "Top 3" rankings for his position. Manu Ginobli has lost a step over the years, but never gets the attention as 6th man like he used to. Tim Duncan is the quietest superstar who rarely sees a SportsCenter highlight.
I'm not calling them underrated because anyone with a mind for basketball knows the Spurs are a great team. However, in today's basketball world of shoe deals and dunk-o-meters, they get little to no airtime. Hell, we used to hear more about Boston's "Big Three" and their one title than the Spurs and their four titles.