I think Kane 1997-2002 was absolutely brilliant, he could move, he had power strength and a good bit of speed for a guy his size, he also had the look and an aura, so much has changed since then though
He has come off the roids (as have most) and it shows, look at his arms now compared to 1998
He is bald, injuries have taken their toll on him two and nature has taken its course and slowed him down!
Do I think he is or was a great wrestler? No, however its Pro Wrestling, its not all about that, its about the whole package and Kane in his first 5 years had that, I would compare him to Batista, someone of similar size and build, yet you look at what Kane could bring to the table and then look at what Big Dave brings, which is essentially nothing!
Obviously now Batista is considered better than Kane, but in their respective primes I would say Kane had far more depth to his in ring psychology, his matches and his character