Upgrade Grizl to what?

Bought a Grizl 6 because it was a good deal and wasn't convinced I was going to love gravel this much.

I'm hooked. Did Unbound 100 this year and hoping to get through the lottery for the 200 in 2025.

Looking to upgrade to a carbon frame with better components and while I love my Grizl, a used bike is going to be a better value for me and no one seems to sell their used Grizl.

What are some good brands that I might find used and have decent tire clearance? I found a few Cervelo Aspero but not convinced the tire clearance is enough.

Bike will be used for "racing" (me vs myself) in a wide variety of trails conditions so would prefer wider tire clearance options.