Since I am SO OLD, if would be difficult to pick out any of the old analogues as being any worse than the next. And if I played them 50 years ago in the '60s, they were already 10 to 20 years older than that.
With only 16' pedal stops, I'm not sure if any of these could be condsidered "classical" organs. An old Allen I played at a church back in the early 60s was memorably booooring! With 50 0r 60 stops that ALL sounded the same, this relic was definitely not a winner.
Move on to the early 70s to a church that had Conn's first version of the Artist model with 32 note pedal board. While I tend to regard Conn instruments as the very best of the early analogue instruments; in fact they were beautiful musical instruments in their own right; but this early Conn Artist was somewhat less than remarkable.
So what to do?? I the early 70s I bought a Hammond H100 for the simple reason that it was the ONLY electronic organ in the world that offered anything other than muddy 16' stops. It actually had the equivalent of 8' reed stops, which was exactly what I needed for purposeful practice. That Hammond H100 had to be one of the most obnoxious instruments of torture I've ever encountered; yet it offered me an opportunity to practice and develop my pedal technic.
For sure, the Hammond H100 had to be the most horrible sounding instrument I've ever owned. I finally gave it away to a church; and came back to bite me when they 'played' that organ at my father's funeral.
Within such a disenchanting world of analogue "organs" it's rather difficult to pick out one above the others as being total crap! Basically, they were all crap!
Then in the '90s with the advent of the digital-sampling age, we started to see some rather attractive instruments appearing on the market; notwithstanding that in the '00s, we started to witness the advent of some rather awesomely credible digital organs being offered to the organ-buying world.
And from my own perspective, it difficult to imagine anything better emerging any time soon.
It just gets better and better each and every year.