As I previously mentioned, prog had a huge revival starting in the early mid 90’s.
Bands in the 80’s, Marillion, IQ, Twelfth Night, Pendragon, and all the "neo prog" bands, were good. But to me, they were kind of watered down. They tended to have the surface veneer of prog, but the deeper structure of the music, was just not as complex, creative, lacked the musical theory as most of the 70’s bands, and overall, the musicianship was not at the same high level of the 70’s bands.
Something happened in the 90’s, up through the present, where many of the new prog bands, were much more like those of the 70’s, not in that they were all retro-prog, but the level of musicianship, complexity, music theory, etc reached the same levels of the 70’s bands.
I can recommend many new prog bands, but my tastes are not always in the symphonic style (Genesis, YES, King Crimson, etc). I like a lot of avant-prog and Zeuhl prog, so, YMMV.
Bands like:
Anglagrad (Sweden) / complex, symphonic prog, with king Crimson, Genesis, Schicke, Fuhrs and Froeling influences.
Deus ex Machina (Italy) / jaw dropping musicianship, intense prog, that sometimes straddles the line between prog and fusion. Lead vocalist has a 5 octave range.
Tipographica (Japan) / avant-prog in the Henry Cow vein
Höyry-Kone (Finland) / more avant-prog, with some Crimson influences
Aranis (Belgium) / more avant-prog, with incredible musicianship. Not quite as thorny sounding as some avant-prog bands
Echolyn (USA) / great US band. Early on, they has some Gentle Giant influences in their complex vocal parts and constant time changes. Lately, they are a bit more song oriented
Miriodor (Canada) / kind of a mix of Canterbury scene prog, and avant-prog.
Koenji Hyakkei (Japan) / Magma influenced Zeuhl prog.
Corima (USA) / more Magma influenced prog
D.F.A. (Italy) / great band that sort of straddles the line between prog and fusion
Forgas Band Phenomena (France) / another prog / fusion line straddler
Mike Keneally and Beer for Dolphins / complex, quirky prog with Zappa influences
5UU’s (USA) / avant-prog
Isuldar’s Bane (Sweden) / really good, complex, symphonic. They have a couple recent albums, one with Steve Hogarth from Marillion on vocals, and one with Peter Hammill on vocals.
After Crying (Hungary) / started out being a chamber-prog band, later became more symphonic, with some ELP influences. Really good band. They did a great live album with John Wetton on vocals.
Finisterre (Italy) / very good, classical sounding Italian prog
Transatlantic (International members) - really good, classic sounding prog.
Other bands of various subgenres of prog: Univers Zero (Belgium), Setna (France), Riverside (Poland), Discus (Indonesia), All Traps on Earth (Sweden), Manna/Mirage (USA), I could go one for pages.
Once again, some of these bands will not be in the; washes of Mellotron, Hackett like guitar playing, Hammond organ, Squire bass playing type of prog. They will be a bit more 'thorny' sounding, with use of atonality and dissonance, and very complex arrangements. Some might even say, they may take a bit of work to get into (it did me), but the rewards are high.