Tucano Youngster 10.1.
It's a universal case holding the tablet with rubber bands at the edges, which doesn't look much nice, but such is life.
The occasional app might need an app like"Rotation", which supports enforced autorotation. Then you still have the nav buttons on top, but you knew that. Fitting the tablet the wrong way allows to hold the case one-handed easily, stick the thumb thru the sling at the zipper and grab the right side of the case. This however works better with the 7" version of the case, which i also use.