We do. It's called a Glaive, it's a polearm with a blade. Or if you mean like more 50/50 grip/sword - the Nodachi would be what you are looking for.

Swordstaff says hi! As do nagamaki! Usually, though, it's that half-and-half is generally a bad ratio. If you can grip the sword along the blade, then why is the longer grip needed? You've got a multi-purpose grip right there in your armored hands.

Alternatively, if you have a long grip, why do you need the extra weight of a long blade? That extra weight would make any potential slashing motions unwieldy, so generally a shorter blade is preferred.

... you mean a spear?