How many south American leaders have died in plane crash?

It seems there is an connection between an aircraft and leaders of from South American nations. Although the stories of big sharks who died in plane crashes do get media coverage but most answers are opaque and the mystery surrounding the death remain unsolved. Name of south American leaders who died in plane crashes: José Félix Estigarribia, Paraguay (1940) Nereu Ramos, Brazil (1958) Humberto de Alencar Castelo Branco, Brazil (1967) René Barrientos, Bolivia (1969) Jaime Roldós Aguilera, Ecuador (1981) Omar Torrijos, Panama (1981) Am I missing some names?