Can anyone help me choose a butterfly bush for this spot? I need a large shrub or small tree to shade an enclosed entryway which really heats up in the summer. I want something deciduous that will have leaves from about 4' off the ground to about 10' max. It will be surrounded by the driveway, a walkway, and the concrete skirting around the house, and will be about 6' from the house, so it can't get too big.

I thought a buddleia would be ideal, but not a huge shapeless mound - something that either has more shape or can be pruned to have more shape, and which is long flowering and fragrant. I briefly thought of buddleia linleyana, but it's not fragrant, and buddleia alternifolia has too short a bloom time and has to be trained. Thanks.