Recently re-watched ECW Hardcore Heaven 97 and that Bam Bam-Spike match was real fun and Bigelow was great in it.
I think you could argue his ECW run was the best of his career. I'm a big fan, but at this moment I think he'll be pushed off my list based on the greatness of others.
Comparing to other big men, I'd put: Hansen, Vader, Mark Henry all above him easily.