Cross-Platform Social Media Banner Design

I'm in need of a unique and creative banner design for my business' social media profiles including Facebook, Twitter, Instagram and YouTube. The primary purpose of the banners is to enhance our branding. Since I haven't specified any elements like color schemes, fonts, or images, I'm looking for a designer with strong creative skills to come up with original concepts. Experience with social media branding and a portfolio of past work is desirable to ensure the banners align with current social media design trends and practices.