For high VRE-share power systems, dispatchable technologies are critical to assuring load is covered when VRE output is not physically or economically available. This project focuses on assessing the role of these firm, dispatchable, low- and no-carbon technologies in net-zero environments dominated by variable renewables. As explored in previous research, the crucial problem is covering load when the profiles for both wind and solar are so low that no amount of VRE investment will cover load. Scenarios comparing high capacity cost and low dispatch cost technologies (e.g. baseload) versus low capacity cost and high dispatch cost technologies (e.g. peakers) explore the tradeoffs of these generic technology types with respect to overall system cost and performance in these net-zero environments.