Which Card Should I Get Next?

Hi. I currently have 3 cards. I am 19 and I have a Capital One Platinum with a 3k limit, which I got almost 2 years ago, a Capital One Savor with a 4.5k limit which I got a little over a year ago, and a Chase Prime Visa which I got around 7 months ago with also a 4.5k limit. I am looking to replace my Capital One Savor with a better card with higher rewards, but I am not sure what to get. I am looking into a bunch of cards, such as the Chase Freedom Unlimited or Flex, the TD Double Up card, the Synchrony Premier World Mastercard, and the Wells Fargo Active Cash or Autograph. I also saw the AMEX Blue Business Cash, but I don't own a business or anything and idk if my income is high enough to receive that card. Any tips on which of these I should apply to and in what order, or if anyone has any different suggestions that would be better. I would prefer to just have a higher all around cash back. Also, should I close the Capital One Savor before or after I apply to the new card? My FICO 9 score is 740.