Which cold storage device makers are known for tamper-resistant design and offline key storage?

A few cold-storage device makers are well known for emphasizing tamper resistance and offline private-key storage:

• Ledger — Hardware wallets like the Nano X / Nano S Plus keep keys in a secure element chip and are designed to keep private keys offline.
• Trezor — Uses an open-source hardware-wallet approach; keys stay offline on the device.
• Coldcard (Coinkite) — Often cited for strong security features, including air-gapped operation and offline signing.
• SafePal — Hardware wallets that support offline signing and isolated key storage.
• Ellipal — Known for a fully air-gapped design, relying on QR codes rather than USB/Bluetooth connections.
• BitBox02 (Shift Crypto) — Focuses on secure offline key storage with a compact hardware-wallet design.
• KeepKey — Hardware wallet with offline key storage and a simple tamper-resistant approach.

If you want, I can also give you a comparison table of these devices by features like air-gapped support, secure element, open source, and price range.