Any woman that is concerned about decorating for Christmas is my kindred spirit. Here's my inspiration FP. If you PROMISE not to use the FP until after you demo it, paint the tile around the fire box white, including the metal. Paint all woodwork including ceiling trim white. The FP I am showing has ship lap over the mantle ( a Texas thing from HGTV Fixer Upper). Take off current trim to make over the mantle square. Put up 'ship lap' look alike and trim. The Home Depot will cut your wood if you measure. Nail wood up, fill nail holes. Paint white. Now your marble hearth looks great with the white FP and you can get out your Christmas decor.