You might have never seen them. You might have never heard them speaking. And you might have never probably flipped through their books (probably not). But it is sure they are the guardian angels of Modern Linguistics from the later half of the 20th century world, we study and dwell upon today. They have inspired many a linguists and have set standards that sometimes seem unachievable. Nevertheless, they are the forerunners in their own respective fields. Here is an easy Guide to find them on the web.
The 10 guardian angels of Linguistics:
Noam Chomsky : Generative Linguist, Political thinker and Philosopher
Peter Ladefoged : Phonetician (late)
http://www.linguistics.ucla.edu/people/ladefoge/
William Labov : Sociolinguist
http://www.ling.upenn.edu/~wlabov/
Dell Hymes : Sociolinguist, Anthropologist and Folklorist
http://www.virginia.edu/anthropology/dhymes.html
David Crystal :Applied linguist
Joseph Greenberg : Typologist (late)
http://en.wikipedia.org/wiki/Joseph_Greenberg
Stephen C. Levinson :Pragmatist
http://www.mpi.nl/Members/StephenLevinson
Robin Lakoff : Sociolinguist and Pragmatist
http://www.linguistics.berkeley.edu/people/fac/lakoffr.html
R.M.W. Dixon : Field Linguist
http://www.latrobe.edu.au/rclt/StaffPages/dixon.htm
Ray Jackendoff : Semanticist
http://ase.tufts.edu/philosophy/people/jackendoff.shtml