Ireland's Mr Tayto. Coyle's Largo Foods bought the Tayto brand from drinks firm C&C for €68m in 2006. Adding and developing brands such as Hunky Dory and Sam Spudz, turned it into the biggest crisp maker in the country.
German food group Intersnack bought a minority stake soon after, ultimately taking full control of the firm last year. In the meantime Coyle (64) has developed the Tayto Park theme park beside the Largo factory in Meath, spending over €45m to turn it into one of the country's biggest outdoor tourist attractions.
Last year it opened Europe's biggest rollercoaster. Coyle's holding company Irish Bison had net assets of €45m last year. His daughter Natalya competed at the London 2012 Olympics.