Actually the vast majority of the Germanic heathens, whether the Anglo-Saxon kingdoms in England, the Germanic tribes on the continent, or last of all the Scandinavian nations, were converted through the efforts of missionaries. The heathen Anglo-Saxons of Britain were converted from their worship of Woden/Odin, Thunor/Thor, Tiw, Freya et al. largely through the directing efforts of pope Gregory, who sent Augustine of Canterbury together with many monks to Britain to preach the Word of God to the Anglo-Saxon race. Although the mission lost heart at one point at the prospect of facing the fierce barbarians, encouragement from Gregory persuaded the mission to go on and ultimately Aethelbert, King of Kent, gave them a dwelling-place and food at Canterbury, and allowed them to freely preach the Word. After a long period (with some reverses) Christianity eventually took hold throughout Anglo-Saxon Britain, and the Anglo-Saxons in turn sent monk missionaries such as Willibrord (a Northumbrian) and Boniface (a West Saxon) to the continent, first to Frisia, then Saxony, Thuringia, Bavaria and elsewhere. It was through the foundation of monasteries that Christianity was ultimately established in Frisia and central and western Germany. Yes, it is true at a later point in time Charlemagne pursued military campaigns against the heathen Saxons and defeated them in a battle in 782, the survivors of which were forcibly converted. But that was not how the bulk of the Germanic/Norse heathens became Christians. And of course later, missions from England and Hamburg-Bremen were key to establishing Christianity among the Scandinavians, first among the Danes in the last third of the tenth century, Norway in the first third of the eleventh century, and Sweden much later.
Yes, there was a top-down aspect to the conversion, as the missionaries focused their preaching on the leaders, but the idea that the bulk of the heathen Germanic/Norse nations were converted through violence is rubbish, although you certainly do a good job of repeating the politically-correct version of history that one might take away from watching Hollywood movies.
The top down aspect you refer to had many executions attached to it. Good work on the timeline, and I'll even give you that many of the missionaries may not have intended the kings and local rulers do so much killing, but the idea it was voluntary is incorrect in far too many cases to be a coincidence.