Didn't pick either of these, but neither choice surprises me. I remember checking out a lot of Gildenlow's stuff back during Transatlantic's Whirlwind album cycle, and was really impressed with his abilities. Ultimately, he just isn't for me. But I couldn't help but be impressed by his talent.
Used to like Heart back in the early days, but lost my love and respect for them eventually. I can understand why Ann is on a LOT of these kinds of lists, not only on DTF, but virtually every list of best rock singers out there. That's why I think so many find it so surprising for some to say they never heard of her. She is so ubiquitously heralded as a great rock singer everywhere, and has been for so many decades now. Whatever country you are from, I can almost guarantee Heart charted VERY high there at some point.