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Ralph Lundsten (6 October 1936 – 5 July 2023) built his own electronic musical instruments and was one of the pioneers in this field.

Solar Plexus was a high profile jazz rock band from Stockholm formed in 1969. Their music was diverse and eclectic (the albums themselves sung in Swedish but released in English as well). They disbanded in 1976 after releasing four albums in total.

https://en.wikipedia.org/wiki/Progg

Bjorn J:son Lindh (1944 - 2013) started his music education at Ingesund College of Music in Arvika. He continued his musical studies on piano and flute at the Royal Swedish Academy of Music in Stockholm during the latter half of the 60s. He then went on to play free-jazz.

He played lots of styles, ranging from fusion, progressive rock and jazz with mainly North African influences, to classical chamber and symphonic music, as well as composing for theatre, TV and movies. His first album, "Ramadan" is an Eastern flavored jazz-rock fusion (and folk) album.

Multi-national jazz fusion group based in Sweden, around from 1973-1974 and released two LPs.

Hedningarna (The Heathens) is a Swedish, and for some years partly Finnish, folk music band that mixes electronics and rock with elements from old Scandinavian folk music. Trä = wood

Den Fule (The Ugly) was a Swedish folk music group formed in Gothenburg in the early 1990s.

Swedish folk rock band, formed 1990. https://garmarna.bandcamp.com/album/f-rbundet

Swedish band from Jämtland, formed in 1989, which combines folk music with modern rock into a distinctive folk rock. https://hovendroven.bandcamp.com/

Änglagård is a symphonic progressive rock band founded in 1991 in Stockholm, Sweden. Disbanded in 1994, reformed briefly in 2002/03 and active since 2008. Their 1992 debut, Hybris, brought them international acclaim.

Swedish progressive rock band, formed in Saltsjöbaden south of Stockholm in 1970. Their name in English is "Thirty Years War". The band is usually counted among the "progg" movement.

Dungen ("the grove") is a Swedish band based in Stockholm, fronted by singer, composer, multi-instrumentalist Gustav Ejstes. Their music blends psychedelic rock with alternative rock and Swedish folk music. Part of the new progg (nyprogg) scene.

https://dungen.bandcamp.com/

Another band from the progg movement, Kebnekajse play a variety of styles starting from hard rock, but moved to folk music, symphonic rock and jazz fusion.

Swedish instrumental band from Göteborg formed in 1997. They play an instrumental form of progressive rock, blending psychedelic and Swedish cultural folk elements in a similar manner Kebnekajse.

Gösta Berlings Saga, from near Stockhom Sweden, has become known for their dark and unique instrumental progressive rock.

https://gostaberlingssaga.bandcamp.com/

This is their debut "Time is Sound"

RIO founding member Samla Mammas Manna (Uppsala, Sweden) was formed as the trio of: Hollmer/Krantz/Bruniusson, they became best-known when joined by guitarist Coste Apetrea. In 1977, when Coste was replaced by the far more experimental Eino Haapala the style changed so much that the new name Zamla Mammaz Manna was chosen. This incarnation of the band existed for some 3 years or so, after which the band disintegrated with two members forming the new project Von Zamla.

Simon Steensland is a Swedish multi-instrumentalist (drums, percussion, keyboards, wind instruments, etc.) and composer in the avant-prog field.

Swedish band Myrbein (which translates as 'ant leg') formed in 1977, with inspiration from Samla Mammas Manna. Their only album titled "Myrornas Krig" means "The War of the Ants".

Progressive heavy rock band founded in Borlänge, Sweden in 1991. Their music is associated with the tradition of 1970s progressive rock music, especially King Crimson.

Mattias Bernt Johannes Eklundh (born 6 October 1969 in Gothenburg Sweden) is a metal guitarist with Freak Kitchen. He had released a series of solo "Freak Guitar" albums, exploring a variety of other styles.

In The Labyrinth is an experimental prog-folk group based in Stockholm, drawing on a wide range of styles.

Gunnar Peter Annellssson (born 1957) is from Malmö Sweden.