Mal or dutch shepherd if you have the time and wherewithal to work them properly. It's every day. Big german shepherd otherwise.

We have a 60 pound dutchie and a 120lb weimeraner.

Our dutchie speaks english after being with us for about a year (all of ours were adult rescues). Just tell her what to do and she's on it. She came to us with a bad get out of the yard habit. That was tough to work through and she isn't 100% - more like 98% - if she sees a deer/rabbit/other dog, she really wants to go chase it.. She also sneaks about 1/4 of a lick in daily. No licking people in our house so that's a tough one when they love you so much.