I'm currently in the midst of drafting up my statement of purpose for the upcoming application cycle in the USA, and am feeling very confused as to how to go about the part where I mention how my research interests align up with those of prospective advisors. More specifically I'm wondering how narrow my research focus should be, and how specific I should be when mentioning advisors I may want to work with.
I am well aware that I should be mentioning how my research interests line up and fit with those of prospective advisors that I hope to work with; on that note I've heard that I should be aiming for one (if not two) advisor that I would really like to work with. However, I have also heard that being too specific on these things could potentially backfire, especially if prospective advisors aren't taking students or if research interests are too narrow to match up.
On the other hand, is it bad to be have interest in working with multiple advisors/labs at a department (since you may be able to work with another lab if one doesn't necessarily work out)? Do they necessarily need to have similar research interests, especially if they are within a similar field?
Edit: I would be applying to a PhD holding just a BS, having worked as a consultant for the past year and a half, and I am applying in the USA, if this information helps.