Some perfect pangrams (containing exactly twenty-six letters) have been written but they rely on obscure words and border on the non-sensical.
Cwm fjord-bank glyphs vext quiz
(an eccentric's annoyance at finding ancient inscriptions on the side of a fiord in a valley).
Vext cwm fly zing jabs Kurd qoph
(an annoyed fly in a valley, humming shrilly, pokes at the nineteenth letter of the Hebrew alphabet drawn by a Kurd).
Nth black fjords vex Qum gyp wiz
(an esteemed Iranian shyster was provoked when he was cheated: an alleged seaside ski resort he purchased turned out to be a glacier of countless oil-abundant fiords).
Blowzy night-frumps vex'd Jack Q (self explanatory)