Ou i like the last one :)
I love the painting. I don't have a mantle, but I wish I did! Yours is so huge and has lots of possibility.
I also like the tulips painting ... more contrast than the wreath options. Though I don't know what to put on the actual mantel. It's only about four inches deep, so not a lot of surface space to work with. Hmmm ...
what about some frames? you could just lean them up against the brick.
you could extend the mantle outward (make itmore of a shelf, new style mantles) and it could be a place for family photos,artwork etc. and then it could change with the seasons. Wreaths of all seasons,different photos. Artwork change it up!