I don't like hybrid poplars at the best of times. They are typically "improved" to enhance growth rate for fibre production. That's good if you own a pulp mill. Conversely, they mature fast, and begin to decline sooner. It sounds as though you realize this, and are aware the trees will become a hazard sooner than others.
I would recommend birch on dryer sites - they grow slower, but are more than likely native to your area and will be longer lived and more reliable. Some pine species will also suit your needs - check with your locals to see what species will grow well where you are. Sorry, I just can't support hybrid poplars for much other than fibre production.