Tl;dr best I can think of is a keysmart for your keys with a Kingston usb attached (they sell one that fits, I'd image you can buy the same model separately). Keychain, car keys, and fob stay as is. Gerber dime get moved to a different pocket, it could stay, or as someone else suggest replace by a small Victorinox Swiss army knife, or a letherman PS, PS4, or Micra. You could also look into using S-Biners to help organize everything on one keychain. It's a carabinier that has two locks. Think of it as a keyring for your keychain, but you can remove what's attached to the k ring quickly.

I have A keysmart. 5 keys like you, and 1 fob. I have two work keys which are longer than regular keys, so I had to get the the extended version, it's longer than the original. I have a small key, probably similar to a mail key size that is across from my fob. The fob is about 1 3/8 inches in length and shaped like a pear (you can get a reference for it by searching for Keri Fobs). My smaller key and fob fit across from each other with a little space in between. So if you go this route you will need to get the extended just for that part. Though you could ways just have the fob sticking at an angle. I got the 2-14 key one, it can only fit 6 as is. Search "KeySmart Extended | Compact Key Holder and Keychain Organizer (2-14 Keys)" on Amazon. Of course this means you have no room for one of the flash drive attachments, unless you choose to keep the work fob separate, or buy extenders for the keysmart, which let's it hold more, but obviously makes it bigger

3 years ago my car key fob combo broke off of my keychain and even though I have since replaced it I have decided to keep my car key and other keys separate. Car key is by itself, I don't have a typical keychain anymore. Both car key and keysmart are in my pocket separate. I do keep an empty carabinier on my belt look though because every now and then I'll have to drive a company vehicle, like today, and I don't feel like cluttering my pockets with more stuff.