The Collaborative International Dictionary of English v.0.48:

Johnsonian \John*so"ni*an\, a.
   Pertaining to or resembling Dr. Johnson or his style;
   pompous; inflated.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "Johnsonian":
   Gongoresque, affected, bedizened, big-sounding, convoluted,
   declamatory, elevated, euphuistic, flamboyant, flaming, flashy,
   flaunting, fulsome, garish, gaudy, grandiloquent, grandiose,
   grandisonant, high-flowing, high-flown, high-flying, high-sounding,
   highfalutin, inkhorn, labyrinthine, lexiphanic, lofty, lurid,
   magniloquent, meretricious, orotund, ostentatious, overdone,
   overelaborate, overinvolved, overwrought, pedantic, pompous,
   pretentious, rhetorical, sensational, sensationalistic,
   sententious, showy, sonorous, stilted, tall, tortuous