I found this index of "welcoming" countries, ranking them by number of source countries accepted visa-free or with visa on arrival: https://www.passportindex.or

I found this index of "welcoming" countries, ranking them by number of source countries accepted visa-free or with visa on arrival: https://www.passportindex.org/byWelcomingRank.php https://www.passportindex.org/byWelcomingRank.php Singapore indeed does rank high, it has all the infrastructure for holding conferences, and it's an international hub. They speak English which is also a plus.