Henry Watson Fowler (10 March 1858 – 26 December 1933) was an English schoolmaster, lexicographer and commentator on the usage of the English language. He is notable for both A Dictionary of Modern English Usage and his work on the Concise Oxford Dictionary, and was described by The Times as "a lexicographical genius".
Another dictionary that meets my criteria for actually buying one: recently updated, lots of usage examples. This one also has a nice reference section, with interesting items such as: biological classification, a style guide, proofreading marks, major divisions of geological time (a good mix of sections you would and wouldn't expect from a dictionary).
I'm unlikely to buy another hard-copy dictionary since the information is so easily accessible on the internet, but it's nice to be able to page through a reasonably heavy tome and discover new information.
I'm still using my forty-five year old 6th edition and even though I do sometimes wonder whether I should purchase a newer edition nothing has the same appeal.
This is my go-to version of this dictionary, though I have most of the editions up to the 10th, and also the ODE. I noticed that some words started having changed definitions from the 1990's ('mandate' was the word that set me on this thread of research, though I looked up many different words), which was interesting to observe, especially in the context of the world in which we live now. I find up to the 8th edition (1990) the most reliable, but use the more modern editions for comparison. It's also encouraged me to question whether newest is always best.