Wise formerly TransferWise are excellent, good rates, and secure and never let me down. Multi currency accounts, technically an on line bank without the silly fees.

Avoid WorldFirst.

 

If looking for a large one time transfer, like money to purchase a house, wire transfer from your bank to a PI bank account. You could do $100k USD for less than $50. It's there in one day or less depending on when you initiate the transfer.

 

Wise.com is an excellent service, I use it often to transfer 5000 AUD at a time, and the rate is the same as XE.com daily rate with a very small fee.
Transfer to BDO can take anywhere between 1-4 hours which is sensational service for an international transfer. I use the PAYID system in Australia to instantly pay Wise from a bank account in Australia, they update on their site and email to say they have received it within minutes and that they have already made payment to BDO.
They request a reason for payment from a drop list and I always pick general living expenses.