I was thinking about planting the whole length with some OG because it is narrow and very hard to mow must be weed whacked.

I was thinking OG would look good and be maintanance free. What would you all suggest?

I was thinking Pampas Grass but it is So common here I would prefer something a little different. I would need something that is thick and out competed all weeds.

Thanks for suggestions.

Still, to be certain, your best bet would be to skin off the sod, and put down a layer of landscape fabric. Then plant your new grasses through holes in the fabric, and cover it all with a thick layer of mulch. After that, your only maintenance would be an annual haircut for the OG.

Here's a 'hedge' of Pennisetum in my front yard:

It's Pennisetum alopecuroides 'Moudry,' with 8 plants in a 20' line, and Blue Fescue and Mexican Feather Grass in front of it. This species tops out at 3' to the blooms, but there are others which get a bit taller.