Personally, I would aim for a compromise. It depends on the “chashivus” of the OOT guests. Can they come in a day before? If not, and they are close to you, you should make a separate minyan. I went to an early minyan bris out of my area, and had to leave my house at 5AM in order to make the bris on time. Bli neder I will not do that again. I would either make arrangements to be nearby as of the night before, or not go. My brother’s son and daughter-in-law made a bris recently for their new son, and arranged to make it conveniently for MOST of their guests, by moving the bris to their old neighborhood. To go to their present location would have been very difficult for most people, including a Bubby and many other close relatives and friends.
People who will be slightly inconvenienced (i.e. going into work later) will do so if they are close to you. A bris is not every day. I would try to make the bris an hour later than the usual minyan, to accommodate people who need to travel to or from say, Lakewood or Monsey. Since you are asking about it, obviously this is of concern to you. Otherwise you would do whatever you wanted in the first place.
Personally, I don’t eat a fleishig meal in the morning (never could understand how goyim eat bacon and eggs or ham and eggs for breakfast). Bagels with lox or tuna, or even just cream cheese are just fine. Just give me a coffee and I’m good to go.
Unless there is a compelling reason to delay the seudah, why not do it right after the bris? Ask your rov about that, ebcause that would solve some of your issues. And to anyone making a bris (or a kiddush) mazel tov on the birth of yor child.