Going back some time I would bet we've had more LB drafted than any other position in the GP era.
Since 2000
Stephen Hodge
Robert Hensen
Jason Phillips
Daryl Washington
Tank Carder
PJ Dawson
Josh Carraway
Travin Howard
Ty Summers
Doesn't include undrafted FA David Hawthorne and Jonathan Anderson. That makes 11 guys in 19 years.
http://www.nfl.com/draft/history/fulldraft?abbr=T&collegeName=Texas+Christian&abbrFlag=0&type=school
your list is a bit skewed. josh carraway was a defensive end at tcu and drafted to play linebacker. if you claim him for that list you might as well claim jerry hughes. additionally,
the frogs had a great run a linebacker in 2009 and 2010 drafts where they had 4 linebackers drafted in:
robert henson - 2009
stephen hodge - 2009
jason phillips -2009
daryl washington - 2010
joined by:
tank carder -2012
paul dawson -2015
travin howard -2018
two issues here are a bulk of these guys were playing in college when the average high school recruit was 7-8 years of age and only 1 is still in the league.
not knocking these guys, great college players and they got an opportunity very few college players get in being drafted and making an nfl roster.
proximity of time does matter and marcus cannon as a reference is far more valuable playing for the pats and having a couple of super bowl rings than having played in the rose bowl versus wisconsin.
heck, vaitai playing for the eagles against the pats is more valuable in recruiting than that rose bowl win.
offensive tackle however has had 8 players drafted:
anthony alabi - 2005
herbert taylor - 2007
marshall newhouse - 2010
marcus cannon - 2011
tayo fabuluje - 2015
halapouilivati vaitai - 2016
matt pryor - 2018
joseph noteboom 2018