French recent prog band Syrinx in Reification (2003) and Qualia (2009)

Another seriously impressive more recent release, although please note that their first cd came out already 20 years ago!  This sounds very much like the classic instrumental progressive, very intensely electric, of Arachnoid or classic Shylock, and the later band Philharmonie from their guitarist Lepee.

There is mellotron, intense chord changes, a lot of dissonance and tracks that evolve in all kinds of crazy directions.  Note from discogs, info here:

Syrinx are a French instrumental progressive rock group, formed in late 1999, from Annecy (Haute-Savoie, Rhône-Alpes) France. Syrinx deliberately hid their identity, hence the exact line-up is unknown. To quote the promo CD-Rom with Reification "The musicians of Syrinx come from different bands, some of which are well-known on a national or international level. They work together to attain a common goal which bears the name of Syrinx: thus, the name and career of each musician are unimportant."

Web sources document the band as: David Maurin (2) (guitar, flute), Benjamin Croizy (keyboards), Samuel Maurin (bass) and Philippe Maullet (drums). The first three members also play in the band Nil (8), whereas Philippe Maullet is a much-travelled session drummer.

From the 2003 album, the great dissonant riff plus irregular rhythm of L'Hypostase des Archontes:

From 2009's Qualia, the last track which is coincidentally the shortest, has some wonderfully odd changes, all with that classic French spacey-scifi-spooky prog sound: