Sungate Community, a mid-century subdivision on the border of Midtown and South Tulsa (South of 51st, East of Sheridan) and has a very respectable showing of modern homes.
A few streets of predominantly moderns exist though the neighborhood is largely comprised traditional ranches with a few moderns here and there. Many are unfortunately not particularly cared for though there seem to be a few of which the owners obviously take pride in. From my experience these seem to be rather affordable homes and are rarely cherished for their design so there may be some deals here if the right one were to come available.
From the Sungate Marketing Packet obtained at the Tulsa Public Library
…The unique new land of fine home living conceived and created by a group of Tulsa’s leading builders… Planned to be Tulsa’s last word in location… in livability… in luxury (at a likable price)… Offering you true individuality in the home you select… plus the distinction of an expertly planned “community”… THE SUNGATE COMMUNITY.