Yeah, I know: Walter who?!?
He was one of the original value investors, an employee of Ben Graham's brokerage after WWII.
He died at the age of 95. He remained an active investor well into his 90s, and I remember occasionally seeing his analysis quoted in the WSJ. He thought all the angst over Buffett's age & successor plan was pretty funny.
"Superinvestor" Walter Schloss Dies at 95 - Bloomberg
Buffett, another Graham disciple, called Schloss a “superinvestor” in a 1984 speech at Columbia Business School. He again saluted Schloss as “one of the good guys of Wall Street” in his 2006 letter to shareholders of his Berkshire Hathaway Inc.
“Following a strategy that involved no real risk -- defined as permanent loss of capital -- Walter produced results over his 47 partnership years that dramatically surpassed those of the S&P 500,” wrote Buffett, whose stewardship of Berkshire Hathaway (BRK) has made him one of the world’s richest men and most emulated investors. “It’s particularly noteworthy that he built this record by investing in about 1,000 securities, mostly of a lackluster type. A few big winners did not account for his success.”
Alice Schroeder (Buffett's biographer) writes about Schloss using his interview with her to not-so-surreptitiously push his political agenda on Buffett:
Walter Schloss -- What a Guy | Alice Schroeder: The Official Website