Fix the Curb Appeal - For US or European designers ONLY

For US or European designers ONLY. I recently bought this mid 50’s home that was remodeled in 2018, at which time they added an office adjacent to the front door and the roof that forms the entryway. There’s something off but I can’t place my finger on it. I’d like to get a few design concepts to help determine the direction I go with fixing the curb appeal. I truly dislike the rough cut limestone that surrounds the front door area and adorns the front peak. I do, however, very much like the smooth limestone on the two front columns. I’m open to modifications to the roof lines, removal/replacement of materials (including the roof), and adding features. I will very likely replace the light fixtures on the columns with gas lamps. We would like to add an approx. 54-60” high wall out front near the street for safety and privacy. I’d like to add a gas lamp or two on the wall as well. I can hire more than one freelancers for this work. Please submit one rough sketch to give me a feel for your design sense. The finished product will be 2-3 designs/renderings/sketches, specifying materials, colors and architectural changes/additions (if any), as well as incorporate a wall to bring it all together. We would like our finished project to be timeless contemporary that pays homage to classic or modern elements but avoids trending.