I would say a border collie too.
Phoebe is a smooth coat mix, and I know for a
fact that she CAN and WILL protect if she feels it's necessary. She is COMPETELY trustworthy on or off lead, always eager to please, and LOVES to help out ANYWHERE she can. And as to the herding, pulling, tracking, retrieving, and agility..........come on, LOL I don't even have to say it
I KNOW the weather restrictions on Orson, he shivers like a Chi when it gets below 68 degrees in the house, and when it's too hot outside, he comes in and sprawls on the ceramic tile in the kitchen
THAT restriction alone, I feel, would make him not as versatile as a border collie.
(I did NOT pick my favorite breed.......I would have tried to make a doberman or great dane fit the slot if that was the case
)