Wake was kind of an average-sized guy. I wouldn't have been able to lift him, but I think most of us could have dragged him if we really had to? But they also needed to be strong enough to knock him out with a drawer, even if he was groggy from half a glass of dissolved sleeping pills...

...oh! We can rule out Ursula. She has a bad left arm. I can't imagine dragging him one-handed, or any way to hit him with the drawer without also holding him up.

Er, not that I can imagine Ursula killing anyone, ever, anyway.