I have two German Shepherds. The only other breed I'd consider getting would be a lab(from working English lines) or a French Mastiff.
Me cooking some steaks with my male watching(nearly 3 years old, he's got half American show lines and half German working lines in him)..
My 14 month old female whose litter mate we just sold to the US Border Patrol. She's got some of the best working German lines in the world in her.
very shitty quality video of her doing some warm-up bite work a couple weeks back..
https://youtube.com/watch?v=ocdXdtmH6P4