If you are not considering Roon, then the internal streaming capability of the Tambaqui is not available. The Tambaqui needs either an external streamer, or at least an external Roon core. Either way it is not really a one box solution for streaming.
I have not heard the Weiss nor the Bricasti. But I do have both Tambaqui and Aurender A20 in the house.
Another true one box solution you might add to your list is the dCS Lina. I recently picked one up and it is very impressive. For streaming it can be controlled via Mosaic with Ethernet input. But it can also act as DAC for other sources.
All three sound great in their own ways. I’m still optimizing Ethernet, power, etc. so not ready to depart with any of them yet.
Good luck in your journey!