I did a poor edit job to show the flat portico. Please feel free to suggest some design for this portico. Thanks

How about a shed roof portico?

Or remove the gable from the garage and lower the height of the gable portico.

If you do nothing else but lower the portico height I think it will look better.

I cant change any roof structure anymore. Do you think the arch or flat design is better?

Any more pattern to add to the flat portico on top below the gable to make it looks better?

I cant change the height either :(

I think the more you simplify the design, the better. So, no arch. Lower portico roof. No pergola on the garage.

What does your house look like now?

If you can do a flat portico, why can't you lower the height of the gabled portico? I think that change by itself will solve your problem. Right now it is so tall, it looks pretentious.

The old house has no portico or second floor. I can only have the option of changing the look of the portico but not its structure since the framing is already done

Oh flat I meant the squared not arch portico. Not sure if my term is correct.

Simplify, so that would mean fewer disparate features. No curve.

Squared off, no arch is what I prefer.