I love the Joe Meek sound. He really paved the way for the experimentalism of the Beatles, et al.
Here's some of my favorite instrumental albums:
1) Chet Atkins "In Three Dimensions (he plays "Blues in the Night" and "Londonderry Air" and somehow they aren't cheesy);
2) The Ventures "Knock Me Out"--the album where Nokie really started to kick ass and bend strings;
3) Richard Thompson's "Strict Tempo" (better than Fairport--with Dave Mattacks, one of the greatest drummers of all time);
4) Eddie Lang/Carl Kress/Dick McDonough: Pioneers of Jazz--this is way before Charlie Christian but some of this stuff really rocks--the interchange in the guitar duets is amazing--"Feeling My Way" is one of the great 20th C melodies.