  We study dark-bright ring solitons in two-component Bose-Einstein
condensates. In the limit of large densities of the dark component, we describe
the soliton dynamics by means of an equation of motion for the ring radius. The
presence of the bright, "filling" species is demonstrated to have a stabilizing
effect on the ring dark soliton. Near the linear limit, we discuss the
symmetry-breaking bifurcations of dark-bright soliton stripes and vortex-bright
soliton clusters from the dark-bright ring and relate the stabilizing effect of
filling to changes in the bifurcation diagram. Finally, we show that
stabilization by means of a second component is not limited to the radially
symmetric structures, but can also be observed in a cross-like dark-bright
soliton configuration.
