Bo Diddley - 'Jungle Music' (Blues Collection CD).
When the series of CDs/magazines called the 'Blues Collection', sold in newsagents in the early-to-mid 1990s, were good, they were REALLY good. Bo's was an early entry in the series (No. 5), 18 tracks from 1955-62 - small, concise, vital.
It misses a few notable songs (e.g. 'Mona') but in a sense it is all the Bo you really need.
Certainly the 12-CD set from a few years ago would be the equivalent of having 12 helpings of custard!