I'll lookup some links and exact dates this afternoon, but here are some appetisers:
-Heemskerck first dutchmen to discover route to the east
-Barentsz famous for his attempt to find the east over the north, got stranded at Nova Zembla, also a navy admiral
-Van Noort, first dutchmen to sail around the earth
-Tasman, sailed around Australia
-Hudson, english captain in dutch service discoverd everything baring his name
-Stuyvesant, founder of New-Amsterdam
-Maurits of Nassau, governor of Brazil
-Coen, effective governor of dutch east india, conquered important parts of Java
-Jan van Riebeeck, founder of the cape colony
Not many conquistadores in any case, it was more kicking out of spanish, portuguese and brits than anything else.