I wonder what would've happened if Mountjoy had beaten Alex Higgins in 1982. He lost in a deciding frame to Higgins in the QF from about 30 points ahead, and had him trapped in a snooker behind the green with a red close the pocket. Higgins escaped from the snooker and was rather lucky to pot the red; had he left it, Mountjoy would probably have accrued enough points to win the match. And then, he'd have faced Jimmy White in the SF, and Reardon, who he'd beaten in the SF in '81. Not beyond possibility that he could've gone on to win it, given that he'd already won the UK and Masters, and reached the World Final in '81.
David Taylor, as Cyril said, was steady, and big things were expected of him after winning the World Amateur. But he seemed to find it impossible to beat the top 7-8 pros in the world, and it was remarkable that although he was a professional right throughout the 70s his biggest win was against Reardon in the 1980 World Championship.
Mike Watterson's influence on snooker was primarily as promoter and organiser. He picked out the Crucible and Guild Hall as snooker venues, and brought ITV into snooker by securing sponsorships with Jameson and Yamaha. He also founded the World Professional Darts championship with Embassy and BBC involvment and brought indoor bowls to the Guild Hall. However, his departure from snooker was somewhat acrimonious. Several players on the board of the WPBSA contended that he was making excessive profits from his sponsorships deals, including Reardon, who refused to enter the UK Championship in 1979, citing he had engagements with other promoters. The WPBSA started its own promotions company and took over his snooker contracts when they expired in 1983, and Watterson's form dipped, partly he claimed from off-table pressures and the way he was treated by the snooker world, and partly from the difficulty he found in screwing the ball back as he found he was miscuing a lot.