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If no annual fee, i'd keep them as it helps your history and average age of accounts. If you have an AF, I'd look into upgrading the card into something without one. Also might want to request a credit limit increase. Any cards you don't use, make sure you have alerts set up for when a charge is made to protect against fraud.
You're not going to change your utilization by much, so there are no worries there.
What are the ages of your accounts? Will your AoOA (age of oldest account) and AAoA (average age of accounts) eventually be dropping by much? If not, go ahead and close. You might want to close Capital One anyway if it hasn't unsecured.
IT's not just AAOA, its also how old your oldest account is, which is a factor. Keeping open your oldest account is a good idea if you can without an AF. I still have my credit line from when I was 21, and its a factor on my scores still to this day.
I would go ahead and close all four of them and focus your energies on the cards with larger credit limits. Also, you have four US Bank cards. That's too many from one bank. See if you can combine them so that you're left with only two US Bank Cards.
Just curious if you have considered asking US Bank to PC your Cash Rewards card to another Cash+?