MIMOSA SPENCER VIRGIL Abloh, fashion's highest-profile Black designer, is getting a bigger role within French luxury group LVMH, which is taking a majority stake in his Off-White streetwear label. Abloh, 40, a U.S. national who also works as a DJ and visual artist, was hired by LVMH in March 2018 to create menswear collections for Louis Vuitton, the luxury giant's biggest revenue driver. He will continue in that role while also working with the group to launch new brands and partner with existing ones in a variety of sectors beyond fashion, the company said on Tuesday. His arrival at LVMH…