I'm sure that like Widmark he's best known for his film work, but to me, both of these men are names I know from my Old-Time Radio hobby. Like Widmark, he took a few turns at starring in episode of Suspense, including "The Singing Walls" in 1944, which was an odd Cornell Woolrich story that just about worked; in 1949 he starred in "The Defense Rests" which I really liked - he played an ex-convict employed by a law firm who was framed for murder. Others included "Salvage," "Stranger for a Killer" and "Around the World." He also had a great guest appearance on Jack Benny once.
Anyway, I'm torn being surprise at Johnson having lived to 2008 and surprise that Johnson won't live past 2008.