I would recommend Standert.
https://standert.de/ I bought the Triebwerk Disc with Force AXS and upgraded to the HUNT Carbon wheels for $4600 shipped. If you go with the regular wheels it will fit your budget, i believe. Columbus steel.
There's also the Pfadfinder which is their gravel bike.
Unfortunately everything is sold out at the moment (as is the current norm) but if you follow them on IG you can see when they release stuff.
Super nice people to ddeal with.
Remember their prices are including German VAT which you dont pay if you're in the US.