Gotta be Sparky , best Interactive bash toy of all time,!! Not sure if it can ever be beat.,
Just great call outs as he is being fried.! never gets old.! Add the shaker motor, just epic.

A close second, has got to be Iron monger on Iron Man, right in your face, music pumping,
just challenging you like a bully in a schoolyard at recess....,
gotta take him down.!!

Next, MM iron gate has just the perfect sound while bashing away at it, not to mention the trolls..
never get's old, call out's fit it perfectly...

The crane on Batman Dark Night is also a great one.., may be even better than MM, given
it moves , and making the adrenaline run through your bones, as your trying to get
to the last hit....

And then Big Buck Hunter, great moving bashing toy......

Then No good Gofer's, you have Buzz and Bud, 2 bash toys, with great call outs when hit..
"Don't hit me, hit Buzz"..lol...

And then LOTR,. I guess, hit Balrog who just mumbles something...lol..

I will say it is above Balrog for sure, given they have magnet's to shoot the ball
to and fro, and then holding the ball for a multi-ball.