I was being a bit cheeky, but the club might not have existed beyond the SWL (or even at all) if he hadn't arrived. Can remember visiting a pretty bleak and empty Treyew Road immediately before the Heaney era. Turns out it was all built on sand, but without him, City wouldn't have had multiple promotions and an FA Vase triumph.
In my opinion, the most influential man in Truro City's history.
(You could also make a case for Peter Masters, he stepped in and kept the club alive when it was close to going out of business).