Best credit cards for cashback/points

[kekmaw]

There are a lot of posts about good banking options etc but not that many regarding credit cards so I wanted to start a thread about credit card options that aren't only available to local residents of X country.

I'm mainly interested in cashback/points perks and especially in GBP and EUR.

The options I've found for GBP/EUR:

• SwissQoute but the perk is really just 1% of spend given in trading credit.
• Revolut (any currency) of 1% cashback
• Jeeves seems to have multiple currency options but I've never tried
• Amex ICC if you have a previous AMEX relationship

USD options:

• Mercury offers 1.5% cashback with their credit card
• AMEX: If you have AMEX already, you can sometimes migrate it to US and get a US AMEX card that way (both for personal and business cards)

Any other good options?