There are lots of options, just not in a single card. Get a flat rate 2% cashback card as a base (Wells Fargo Active Cash, Citi Double Cash, etc.) then add other cards that offer 3% in specific categories (e.g. Wells Fargo Autograph for 3% on travel, ransit, phone service, streaming, gas, and restaurants and Amex Blue Cash for 3% on groceries and online shopping). Sprinkle in a few 5% rotating category cards for seasoning (Citi Custom Cash, Discover, Chase Freedom). Use each card only for the appropriate high payout category and put the remainder on the 2% card.

Spread the above card acquisition strategy out over a reasonable amount of time (based on your credit score, number of recently acquired cards, and spending habits) and enjoy the sign up bonuses along the way.