Lawn, meadow, prairie or specimen grass it is all one to the sheep.

Undulating shapes and sizes in an attractive outline help to create a flourishing and sophisticated design in a garden. By varying plants and grass shapes in your landscapes you can create a lively scene.
There is no end to the combinations you could select but below is one option.

Simple Contrasting Foliage

Miscanthus sinesis Graziella is a vigorous ornamental, clump forming grass with bold narrow leaves that grow to 4 feet high. It is well behaved and will not spread and has showy white flowers at the end of the season.
Variegated foliage can add a new visual dimension and the white striped leaves of Gardeners Garters Phalaris arundinacea Picta has floppy to arching leaves that can be stricking. It is a bit of a thug spreading rapidly in damp soil but you can plant it in a buried pot.
The Solenostemon family of Coleus have a wide range of colours often on the same soft leaf.
For mobile grass try Pennisetum alopecurides the Fountain Grass with seed heads that can reach 3 feet high.

Artemesia stelleriana has silver-grey leaves through out the year.

In this selection I have avoided plants grown primarily for their flowers. However if you wanted to intersperse just one flower then a Hemerocallis ‘Imperial Lemon’ may suit the situation.