After recently finishing Doom (Remake) I can honestly say it's one of the most satisfying chainsaws in a videogame ever... those glory kills with it sure are lovely to watch! :P
Now if only they had a mod where, every time you use it, Doom Guy shouts "Stay back, I got a chainsaw!!" from The Simpsons Movie. :)
Hmm... Does the Lancer from Gears of War count?
If so, that!
Sure, why not? :)
Also, the Precision Bladesaw from Breath of The Wild
And a recent addition, the one used by the final boss of Raging Justice