There are very few careers that you can categorize as near-perfect and Aaron Donald, who played ten campaigns for the Rams is one of those rare players.

Charlie Cowan had a long career in the National Football League which went 206 Games deep, all with the Los Angeles Rams.  Cowan shifted from Left Guard to Right Tackle to Left Tackle, and regardless of where he was on the O-Line, he was a steady presence.  From 1968 to 1970 he was a Pro Bowl Selection, and he was twice a Second Team All-Pro (1968 & 1973).  He was not the best Offensive Lineman that the Rams ever had, but his long-duration earned him this substantial rank.

One of the early stars of the Cleveland Rams was Jim Benton, the star End from the University of Arkansas who as a rookie would lead all players in Yards per Reception, though this was 1938 and he only had 418 Yards.  Still, that was the game back then, and he would be a Pro Bowler in 1940 where he had 7 Touchdown Passes, again league leading.  After a good 1940, he took a year off to coach (remember there wasn't a lot of money back then), but he returned in 1942 but due to the depletion of players due to World War II the Rams suspended operations, and he would join Chicago where he helped them win the NFL Championship.

Roman Gabriel may have been the second overall pick of the 1962 Draft, but the former member of the North Carolina State Wolfpack took a long time to officially win the starting Quarterback job for the Los Angeles Rams.  Gabriel competed with veterans Zeke Bratkowski and Bill Munson but in 1966 the new Head Coach, George Allen eliminated all controversy by naming Gabriel the number one QB.