You are right, Smyslov doesnt get much attention either. I think Smyslov is reputed to be one of the best rook ending players ever though......along with Capablanca and Rubenstein....
Reb: that is _excellent_ knowledge. I have his book, called "Rook Endings", co-authored with Levenfish. It's a red book, hardcover, and I think I picked it up at a used book store for under 5$. It is a fabulous book, well capable of turning half points into points and zeros into half-points.
Botvinnik did have an electrical engineering degree, but while he was World Champion, his attention was largely devoted to chess, at least to my knowledge. After he withdrew from active play, he had a lab where he tried (largely unsuccessfully) to construct a chess computer.