One of favorite species for bonsai is Ficus tremula. I have only recently been able to find the species and started growing it. I originally saw the species in South Africa in the collection of Hennie Nel, a great bonsai artist and grower.
The species grows easily from seed, cuttings and root cuttings. Leaves reduce well and it produces figs from the trunk at an early age. A few of my trees that are just several years old are shown in the photo.
I think all bonsai and fig lovers should give it a try