"W" is for Welles!
While I don't have a Orson's version of King Lear, I do have some very cool appearances he made on The Jack Benny Show(!?!), including a three week stretch where he filled in for Jack as host.... very bizarre!
Jack Benny Show - 1940.03.17 Hunchback of Notre Dame parody With Welles
Jack Benny Show - 1943.03.14 Orson Welles fills in for Jack
Jack Benny Show - 1943.03.21 Jack's still sick, Orson hosts again
Jack Benny Show - 1943.03.28 Orson Welles fills in for Jack again
Of course, one of his most famous portrayals was as the charming Harry Lime, in the film "The Third Man" from the book by Graham Greene. Here's a re-post of the radio adaption!
Lux Presents Hollywood - The Third Man
Even though he meets a sticky (though offscreen) demise in the film, the character proved popular enough to generate a radio show with Welles starring as Harry as the protagonist. Less sinister than the film incarnation, the series ran over 50 episodes...
Here's the first 10!
The Lives of Harry Lime - 1951.08.03 (01) Too Many Crooks
The Lives of Harry Lime - 1951.08.10 (02) See Naples and Live
The Lives of Harry Lime - 1951.08.17 (03) Clay Pidgeon
The Lives of Harry Lime - 1951.08.24 (04) Ticket to Tangier
The Lives of Harry Lime - 1951.08.31 (05) Voodoo
The Lives of Harry Lime - 1951.09.07 (06) Bohemian Star
The Lives of Harry Lime - 1951.09.14 (07) Love Affair
The Lives of Harry Lime - 1951.09.21 (08) Rogue's Holiday
The Lives of Harry Lime - 1951.09.28 (09) Work of Art
The Lives of Harry Lime - 1951.10.05 (10) Operation:Music Box
Some of the better (and more obscure) Welles sites on the web? How about an excellent rundown of the film "The Third Man" and it's various locations or perhaps excerpts from Orson's F.B.I. files!?!