Piper, Hixson, and Forbes are three more off the top of my head that had center experience. The funny thing is people think the Farnioks are some under-achievers. Both of them are active in the weight room. Both of them are 100% N. If I had to guess, Will probably only played 50 snaps this year. I honestly couldn't say he did any worse than Jurgens on blocking. But what he did do was deliver a good, consistent chest-high snap. That is important because the QB can spend more time with his eyes looking at the D.
Bo Wilson is another guy that get's negative talk around here. He actually did well most of the season, but when he was getting banged up the coaches finally made the switch. When he was healthy he was actually very active out there. His size is not the greatest, but he was very quick off the line and engaged people on most every play. What Wilson has that some backups do not is leadership. He's a very vocal guy from what I've seen out there. Matt Farniok is one of those pillars on the team that stands out. When he's great he just is not recognized. When he falters, though, he stands out. One of his best games he had three or four really bad plays were what people harped on. Never mind the 80% of the plays he did well.