I personally don't find anything objectionable about the shoes with the buckle on the side. I really like the Glennfinnan Shoe by MacKenzie Frain, and I am quite tempted to place an order for myself. I wonder if the buckle is removable. I don't like the squared toe shoes that you showed, primarily because the soles thicker than I like (again a personal issue). I agree that a cap toe oxford would work better than an oxford for black tie, but my personal preference for black tie would be for a shoe that does not lace.

I think we all have preferences, some based on personal comfort, some based on what is traditional for us, but any well polished, black dress shoe will work fine. If you are in the midst of a bunch of people who are obsessed with your shoes, you are with the wrong group of people, anyway!