Magnolia 'Little Gem'-easily controlled to te height range that suits your requirements ben. Will generally form a clipped block of foliage over time though not as dense as the lilly pilly we chatted about. *Could be used as a "pleached" hedge(st
Line the driveway on Johns side - Syzygium australe 'Aussie Southern' / Lilly Pilly. Could be good for screening the neighbour's garage, behind the jacaranda. Looks like it is quite narrow, or can be kept that way at least.