It is a tough choice since they all have their merits!
I don't use Uber that frequently so the Amex Uber credit may not benefit me the most in the aspect, but I did like the gold status for Hilton and Starwood/Marriott.
I liked that the Presitge offered 2x on entertainment and I have decent interactions with Citi in the past.
I only hear wonderful things about both Sapphire cards so I was intrigued. Forgive me if this is naive, but can I apply for a business card without a business? How would the pairing work?
So to get a business card you should have or plan to start a business, however, there is a lose definition of "business" that some employ (

) The thread here is a good mix of actual business and sorta "business". If you've got a claim to either, then the recommendation is to also get the Chase Ink Preferred because it has a higher sign up bonus than the Sapphires, 80k vs the 50k. It also has different earning categories to complement your Sapphire while being able to transfer points earned to the CSR for redemption. The other advantage to getting business cards is most issuers use your personal credit report to approve them, but don't
report them to your personal credit report. This is useful if you apply to issuers who are sensitive to how many cards have been opened in a set period of time, like Chase.
If you went the Chase route, as
@Albort mentioned getting the quadfecta (or more) creates an earning machine to take full advantage of the CSR redemption. The Freedom while not considered great for use on it's own by most, gets 5x UR (up to a threshold) in rotating categories. The Ink Cash (business) gets 5x UR on office supply stores, cell/internet/cable bills, 2x on gas (also up to a threshold) that can also rack up many points. The Freedom Unlimited and Ink Unlimited both get 1.5x UR on all purchases, so anything not part of a category on another card would gain you .5% using one of those. All the cards can transfer to the CSR if redeeming UR for a travel purchase to get 50% extra, if that's what you want to do. (50k pts is $500 cash, but $750 worth of travel redeemed from Chase)
As for a "business", do you sell anything online semi-regularly (ebay/etsy/
amazon/etc)? Or even in person (flea markets/craigslist/letgo/etc etc)? Perhaps provide a service like consulting? Write freelance? When applying for business cards they ask what your revenue is, not what your profit is. Some stuff that seems to 'pay' little may still work because that old cell phone you fixed up and sold for $300 but only got $10 back after fees and expenses, is really $300 in revenue for your "business".
I don't envy your decision. They all seem like good cards. For me it comes down to, am I willing to pay X amount to get Y in return? If all the lounges and perks of the AmEx plat seems worth it with your travel style, subtracting out the airline credit double dip (and ignoring Uber since you said you don't use it), is that amount worth paying for the perks? And so on for the others. Tough choices.