I don't know what the opposite is of a "wet blanket" (perhaps "ray of sunshine"?), but is it possible to express almost the same hesitation from the opposite di

I don't know what the opposite is of a "wet blanket" (perhaps "ray of sunshine"?), but is it possible to express almost the same hesitation from the opposite direction? For instance, say, "Yes, we can do that, but it will mean hiring four new devs and investing in XYZ server." Or does that just come across as transparently disingenuous? I ask this sincerely, because I am trying to find a way to approach office politics as just part of my job and play it well. But as a developer, I'm also trying avoid the version of office politics where you just promise impossible things then find scapegoats later.