Which coupler?

Going along with my project, I am wondering which coupler to put on my loco. Of course LGB seems to be a standard but I find it very ugly and unreal. Is there anything which has become a kind of standard for non-LGB stock? I thought of Kadee couplers.

Any advice welcome!

I use a coupler I buy from a seller on eBay called pasidump.

It is a link and pin pocket which I use with fishing swivels instead of links (less likely to tip a whole train if a derailment happens).

I have a picture that I can email if you want me to.