Reconfigurable silicon microrings have garnered significant interest for addressing challenges in artificial intelligence, the Internet of Things, and telecommunications due to their versatile capabilities. Compared to electro-optic (EO) and thermo-optic (TO) devices, emerging micro-electromechanical systems (MEMS)-based reconfigurable silicon photonic devices actuated by electrostatic forces offer near-zero static power consumption. This study proposes and implements novel designs for fully reconfigurable silicon photonic MEMS microrings for high-speed dense wavelength division multiplexing (DWDM) elastic networks. The designs include an all-pass microring with a 7 nm free spectral range (FSR) and full-FSR resonance tuning range, an add-drop microring with a 3.5 nm FSR and full-FSR tuning range, and an add-drop double-microring with a 34 nm FSR, wide-range discrete resonance tunability, and flat-top tunability. These advancements hold promise for practical applications.