A database of DIII-D plasmas without edge-localized modes (ELMs) compares the operating space and plasma performance stationary no-ELM regimes found in conventional tokamaks: ELM suppression with resonant magnetic perturbations (RMPs), quiescent H-mode (QH, including wide-pedestal variant), improved confinement mode (I-mode), enhanced D-alpha (EDA-H), low-confinement (L-mode), negative triangul...