Wasn't Smith a Coventry rider when he won his three titles at Brandon?
Collins and Morton were before my time.
Havelock was good in 92, but as you say benefited from a wet track, Jonsson messing up his first ride, Ermolenko losing his head because of the delay and conditions, and Nielsen being injured and subsequently not getting to Wroclaw. Havelock deserved the title, but was also in the right place at the right time.
Loram was probably the same. He was excellent in 99 and 2000, but helped by Rickardsson having two poor refereeing decisions go against him and Hamill being inconsistent. Loram and Havelock were both riders who were never likely to scale that peak again.
Screen I would say was as talented as Tai and on his day was brilliant to watch, but was always handicapped by his poor gating and never got over the leg break he had in 2001.
Tatum was a top rider, but tended to jump out of the way when someone showed him their back wheel. Also amuses me when he insists riders should just get on with it in wet conditions, when he was the first one putting his gear back in the van if he didn't fancy it.