I like this layout. Hanging a gallery wall can be a challenge. A great tip to avoid putting so many unnecessary holes in your wall is to cut out the frame sizes using butcher paper. Attach with painters tape and move them around
Trace photos and wall art in craft paper then you can play with the arrangement on the wall before nailing in the pictures and know where to put nails. I do this for everything I hang on the walls - saves me from having multiple nail holes!