Your best pass protectors are usually on the right side. I have Peter Boma as LG and Patrick Boma as RG with Mankins playing RT until this year where I'm switching Mantra to RT and Mankins to LT. But, it really doesn't matter if the AI wants to get you. The CPU can send someone from out to the side who will get to the passer, or just plow through the line. I have Ron Brown at Center--he didn't make Pro Bowl--but he's rated 93 with 94 potential.
Larry Fitzgerald at age 29 has lost both speed and potential--and he made the Pro Bowl last year. Seymour went from overall 92 potential 92/93 to 84 OVL with 84 Potential at age 32. Some players who don't even play a single game all season keep both OVL and Potential. But, Fitzgerald lost points on his OVL! Now, when I signed Seymour to a contract, off season, he was 92 OVL. After I signed him, off season, he went down to 84 OVL.