Here are some examples for you to choose from:
The Citi Simplicity card and Citi Diamond Preferred card have 18 month 0% APR on purchases and balance transfers with a 3% BT fee.
PNC Bank Flex Visa card offers an 18 month balance transfer intro APR.
Another good option to consider is a Chase Slate card with only 15 months of zero APR on purchases and balance transfers, but with no fee on all balance transfers made in the first 2 months of the account.