This thread has prompted me to revisit a lot of their 1970s albums. the problem with a lot of them (though emphatically not the first two) is that the production sometimes mixes the vocals too low and the instrumentation too much in the forefront. Added to this, that instrumentation can be a bit, erm, crunchy. Not subtle enough, and sometimes an air of stretching rather too desperately to attract a 'rock audience'.

But there are still great tracks to be found.