I have a couple pots of Rhus typhina - staghorn sumac. and I have a small R. aromatica - fragrant sumac.
Fragrant sumac stays shrubby, even decades old plantings won't have any trunks, branches or woody parts no more than 3/4 inch (2 cm) in diameter, max. Leaves are too large for such a small diameter stem to make a believable shohin bonsai.
Staghorn sumac - it does back bud, after terminal bud is pruned, but very sparsely, and often a long distance from the terminal bud. The angle the new branch comes off the trunk tends to be awkward.
Any pruning at all on the main trunk will tend to trigger suckers from the roots.
Sanyasou is the term for Kusamono (accent plant) that is displayed as the focal point of a display, with no accompanying tree. These can be large scale, like the sumac owned by Kimura, which is somewhere around 6 feet tall, 2 meters. It has a beautiful literati style trunk and only one whorl of leaves up top.
Bill Valavanis's tiger eye sumac - a cultivar of Rhus typhina, is small enough to use as an accent plant accompanying a tree. Really attractive in autumn.
By the way, all Rhus species generally are dioecious - meaning male and female flowers are on separate plants. That is the reason I have 2, one dug from a female colony, one dug from a male colony. When they spread by underground root suckers they make whole monoclonal colonies. THey are like aspen in that respect.
So they are a pain in the but to do well, they never really look tree like, but they can be attractive, and with old bark very ''literati style''.
Berries of several sumac are used as a spice, especially in middle eastern cuisines. The Rhus typhina can both be used to make a ''lemonade'' or dried and ground as a type of ''Zaatar'' like a lemon flavored peppercorn.