identity of tall blooming grass
This is miscanthus, a non-native grass. You have a variegated variety.
We no longer recommend planting miscanthus, as it has started seeding into the parks and natural areas, i.e. it has become invasive. Because it is not native (Asian) it is not useful for native wildlife and crowds out native plants. The varieties that bloom earliest are the most problematic, because their seed is most likely to spread it. If you have not planted this grass, (i.e. it's a "volunteer" that showed up or spreads on its own) we'd highly recommend that you remove it.
Can you recommend a native tall grass as a replacement?
Bluestem, Switchgrass (Panicum virgatum) and Bottlebrush grass are possibilities.