Last Sunday Dutch progressive rock radio-program Xymphonia aired their Best Of 2015.
The list was conducted by adding the top 10-lists of all 5 individual members of the team. This meant on some places there are more than one album.

Here's the list:

Nr. 15
Sleeping Pulse – Under The Same Sky - Edition with acoustic bonus tracks (Prophecy)
Snarky Puppy & Metropole Orkest - Sylva (Impulse!)

Nr. 14
Patrick Watson - Love Songs For Robots (Secret City Records)
Olivier's Army – Back In Command (Private Release)
Blueneck - King Nine (Denovali Records)

Nr. 13
Birds Through Fire - Letters To Thurza (Trench Editions)
Riverside - Love, Fear And The Time Machine (InsideOut)
La Coscienza Di Zeno – La Notte Anche Di Giorno (Fading Records)

Nr. 12
Arcane – Known / Learned (Sensory Records)
Teleharmonium - Scenes From The Land Of The Mother Generator (Private Release)

Nr. 11
Maurizio Di Tollo - Memorie Di Uno Sparring Partner (AMS Records)
Lucy Ward – I Think I Was A Bird (Betty Beetroot Records)

Nr. 10
David Gilmour - Rattle That Lock (Columbia Records)

Nr. 9:
Grice - Alexandrine (Hungersleep Records)
Toto – XIV (Frontiers)

Nr. 8
Hasse Fröberg & Musical Companion – HFMC (GlassVille Records)

Nr. 7
Mystery – Delusion Rain (Unicorn Digital)

Nr. 6:
Advent - Silent Sentinel (Private Release)
The Black Codex (FREIA Music)

Nr. 5
Barock Project - Skyline (Artalia)

Nr. 4
Dave Kerzner - New World (Private Release)

Nr. 3:
RanestRane - A Space Odyssey - H.A.L. (Ma.Ra.Cash Records)

Nr. 2:
Fjieri - Words Are All We Have (Emerald Recordings)

Nr. 1
Steven Wilson - Hand. Cannot. Erase (Kscope)