Ive kept MBU's and they are one of my favorite.
Never had one that was that mean at all.
I personally think he would be fine in there, but I have heard of more agressive MBUs before.
If you look around, there are tons of tanks with MBUs that have plenty of tank mates. Some big some small. As long as its not a crab and doesnt look like a worm My Mbus leave it alone.