I am located in Canada so I only use Shopify Payments. It is extremely easy to set up and has the most competitive fees I have seen. However, it is only available in select countries at this time.
If you're looking for other suggestions, I would check out the payment gateway list here. It is organized by country, so you will need to check what is available to you first.
If you're curious about which ones are better, I would suggest Googling them to see reviews.