I like the suggestions of Vizsla or weim, but I will say my weim, while he carries my heart and is absolutely my joy, has times when he is one of the MOST annoying dern creatures I have ever met! Even when properly exercised and given mental stimulation, weims can make you feel like you’re running a preschool full of overly attached toddlers… On cake. Thankfully mine hasn’t expressed much separation anxiety (helps that he’s always around multiple dogs). BUT booooooy howdy he was a challenge at the beginning. No matter the energy level of the owner, I’d not recommend a weim unless someone wanted that velcro attachment (Touching, touching, we always must be touching!).
I suppose the other breed that came to mind isn’t necessarily easy peasy, but worth mentioning… English Pointer. We just fostered one and she had her independent streak but dang the lady loved to run, and looked good doing it!
I was tempted to say my classic suggestion of standard poodle, but honestly if I were running on trails and the like, I’d want a coat like a weim or shorthair pointer. My parents’ curly poodle mix, even when clipped with a 7 blade, picks up every burr and stick!