At the moment I am mostly listening to Black Sabbath. I would definitely count them as progressive.
Rick Wakeman, my fave keyboard wizard, contributed a few keyboard backing parts for them, just as he did for David Bowie;
I am the world that hides
The universal secret of all time
Destruction of the empty spaces
Is my one and only crime
I've lived a thousand times
I found out what it means to be believed
The thoughts and images
The unborn child that never was conceived
When little worlds collide
I'm trapped inside my embryonic cell
And flashing memories
Are cast into the never ending well
The name that scorns the face
The child that never sees the cause of man
The deathly darkness that
Belies the fate of those who never ran
You got to believe me
I'm talking to you
Well I know it's hard for you
To know the reason why
And I know you'll understand
More when it's time to die
Don't believe the life you have
Will be the only one
You have to let your body sleep
To let your soul live on
I want you to listen
I'm trying to get through
Love has given life to you
And now it's your concern
Unseen eyes of inner life
Will make your soul return
Still I look but not to touch
The seeds of life are sown
Curtain of the future falls
The secret stays unknown
Just remember love is life
And hate is living death
Treat your life for what it's worth
And live for every breath
Looking back I've lived and learned
But now I'm wondering
Here I wait and only guess
What this next life will bring
...
Sorcerers of madness
Selling me their time
Child of god sitting in the sun
Giving peace of mind
Fictional seduction
On a black snow sky
Sadness kills the superman
Even fathers cry
Of all the things I value most of all
I look inside myself and see my world
And know that it is good
You know that I should
Superstitious century
Didn't time go slow
Separating sanity
Watching children grow
Synchronated undertaker
Spiral skies
Silver ships on plasmic oceans
In disquise
Of all the things I value most in life
I see my memories and feel their warmth
And know that they are good
You know that I should
Watching eyes of celluloid
Tell you how to live
Metaphoric motor-replay
Give, give, give!
Laughter kissing love
Is showing me the way
Spiral city architect
I build, you pay
Of all the things I value most of all
I look upon my earth
And feel their warmth
And know that it is good
You know that I should
What a lovely man that Ozzie is! I love the lyrics.

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