I think dogecoin has lowest transaction fees because this is the crypto currency coin who has the lowest price among of them three. Dogecoin also seems a very low on gas fee so if you want a coin whose low on gas fee dogecoin i think is best.
Tron generally should even be the best because of its Trc 10 network, I have done some transaction which Tron before but I have never done any transaction or invest in dogecoin, I may not really know about its transaction fee and any other details about it.
I think Tron has one of the lowest gas fees of the crpytocurrency ecosystem; as for faster I can't really tell which because I haven't used the two coins that much when I realised that they weren't as viable as they were earlier.