Truman was good, I am not so fond of Warren, mainly because of the Warren Report on JFK's death.
Take a look at his record as California governor... they guy was amazing it was either 1944 or 1946 but both party's nominated him for Governor and had Ike not run in 1952 Warren would probably have got the GOP nomination... added to this he was one of the biggest single forces behind the advancement of civil rights in the USA the Supreme Courts ruling on Brown v Board of Education where of immense significance... but you have a point about the Warren report then again I subscribe to the "lone gunman theory" but I do have an open mind and the report was shoddy imho...
I know all about Brown v Board of Education Topeka, Kansas, learnt about it at school.