- Sparrow for coordinator wallet

- Personal Electrum server instance for privacy (I’ve used ElectrumX and Fulcrum, but electrs is also popular)

- Minimally 2-of-2, preferably 2-of-3 or 3-of-5.

- No vendor has quorum

- Prefer open source

My favorite vendor is Coinkite (ColdCard), but like I said, no vendor should represent a quorum of keys.

Additionally:

- consider rolling your own seeds, offline from your own entropy source

- consider using a passphrase

- consider geographic distribution of seed material