Only progressive rock yah?
King Crimson, ELO (Electric Light Orchestra), ELP (Emerson, Lake and Palmer), Yes, Genesis and Jethro Tull.
But general prog bands (some fuse it with other genres) would have to be Dream Theater, Coheed & Cambria, Opeth, Tool, Meshuggah, Fates Warning, Queensryche, Nevermore, Death (everything after Spiritual Healing), Cynic, Atheist, Nocturnus, Aghora, Watchtower etc.
Some of those are more tech than prog like Watchtower, Death etc.
More prog bands (again some mixed it with other genres):
Animals as Leaders, Chon, Scale the Summit, Intervals, Volumes, The Contortionist, Between the Buried and Me, Protest the Hero, Periphery, Veil of Maya, Born of Osiris, The HAARP Machine, The Human Abstract, Skyharbor, Painted in Exile, Textures, Vildhjarta etc.