Well philatelic gods in my estimation, at any rate.  Specifically :

Andrew Cronin - regular contributor to Rossica and just about every other magazine concerned with Eastern Europe, also editor of the Post-Rider (Yamshcik) -- the Journal of the Canadian Rossica Society
Jim Negus - Former editor of Gibbons Catalog and The Stamp Lover, Fellow of the Royal Philatelic Society, and god of Philatelic Literature...he wrote the book on how to index and reference philatelic lit.
W.S.E. Stephen - great collector and author