Did Jayasuriya win the World Cup on his own then? IMO, De Silva was the most important player to winning the tournament in '96, especially with his hundred and three-for in the final. Even then, if winning a World Cup is what counts here, then the argument for not including Viv Richards (and only a ludicrously dogmatic person or someone lacking in cricketing knowledge would make an argument against his inclusion in this list in the first place) shrinks even further considering his unbeaten 138 in '79 final and also his game-changing fielding in '75 final, along with what a large majority of people consider to still be the greatest of all ODI innings, the 189* against England in 1984 (not a final but still bloody remarkable nonetheless). Also Clive Lloyd considering his ton in '75 (at a strike-rate of 120, no less) along with many other fine innings.
By the way, Jayasuriya never literally created terror to anybody, he's a Buddhist, I'm led to believe they're very peace-loving people.