Mycelium is certainly a good wallet for mobile, but I'd go with Electrum either for desktop/laptop or mobile over Coinbase or Mycelium in a heartbeat.
For desktop I also recommend Electrum.
But, afaik, sadely Electrum for mobile still doesn't support hardware wallets. And, maybe I am paranoid, but I would not use a mobile wallet without being paired to a HW.
For my better understanding, electrum mobile wallet does not support hardware wallets? But it can also be imported into another wallet why didn't it support a hardware wallet?
I'm asking this question cause I have never used a hardware wallet and I don't know how it works but I understand electrum wallet.