Rush - Fly by Night

Their second album is the first where they found their prog rock selves.

From wikipedia: The members of Rush have noted that people “either love Rush or hate Rush”,[170] resulting in strong detractors and an intensely loyal fan base. In 1979, The Rolling Stone Record Guide called them “the power boogie band for the 16 magazine graduating class”.[171] A July 2008 Rolling Stone article said, “Rush fans are the Trekkies/trekkers of rock”.[172] Rush have been cited as an influence by artists including Alice in Chains,[173] Anthrax,[174] the Cro-Mags,[175] Dream Theater,[176][177][178] Exciter,[179] Fates Warning,[180] Fishbone,[181] Foo Fighters,[182] Iron Maiden,[183] Jane’s Addiction,[184] Living Colour,[185] Manic Street Preachers,[186] Megadeth,[187][188][189] Meshuggah,[190][191] Metallica,[178][192] No Doubt,[193] Pearl Jam,[194] the Pixies,[195] Primus,[196] Queensrÿche,[197] Rage Against the Machine,[198] the Red Hot Chili Peppers,[199] Sepultura,[200] the Smashing Pumpkins,[196] Elliott Smith,[201] Soundgarden,[202] Stone Temple Pilots,[203] System of a Down,[204] Testament,[205][206] Tool,[207][208] and Steven Wilson.[209] Trent Reznor of Nine Inch Nails said in the 2010 documentary Rush: Beyond the Lighted Stage that Rush is one of his favourite bands, and he has also cited the band’s early 1980s period in particular as a major influence on him in regard to incorporating keyboards and synthesizers into hard rock.[210]