The list includes all English kings from Alfred to William Rufus as well as earlier bretwaldas and powerful Mercian kings (as listed here https://en.wikipedia.org/wiki/Bretwalda).
You can define favorability as you wish. We know these are all murderous psychos, you can cast a favorable vote without endorsing all their actions. I have included links to Wikipedia if you need a refresher, but don't worry about selecting "Don't recall / No opinion", it will neatly identify the less memorable ones.