The Von Rheinfelden dukes of Swabia lost this duchy during the time they were anti-kings, their supporter the Von Zähringen duke of Carinthia (later also claiming Swabia) lost their duchy too in this conflict. The Von Rheinfelden dynasty went extinct before the eventual settlement, but the Von Zähringen basically kept their ancestral lands in Upper Burgundy (Arelat) and Swabia and kept a personal (not really territorial and certainly not a stem duchy, so basically just the rank of a duke) ducal title (duke of Zähringen).
Another famous example is the conflict between the house of Hohenstaufen, dukes of Swabia and often Holy Roman Emperor or Roman-German king; and the house of Welf eventually duke of (the stem duchies) Saxony and Bavaria and the rival to the imperial throne (sometimes successful). The house of Welf actually lost both duchies, regained the duchies and eventually lost both again; the kept most of their dynastic lands though, although after they were stripped form their duchies for the second time that was reduced to their allodial lands in northern Germany. These allodial lands were later transformed in a fief and granted to the house of Welf as the duchy of Braunswick-Luneburg (Braunschweig-Lüneburg). However when the house of Welf were regranted these duchies, parts were split of from these duchies, for instance the margraviate of Austria was promoted to a duchy (while keeping margravial privileges) since the Babenberg margrave of Austria was previously made the duke of Bavaria by the emperor, but he had done nothing, which would justify being stripped from a duchy without compensation, the imperial princes felt that he deserved to keep the (higher) ducal rank. In Saxony the house of Ascania managed to keep a few counties, but the stem duchies of Saxony and Bavaria were only really dismantled after the house of Welf lost them for the second time.
Roman-German king Rudolf of Habsburg (after being victorious) could strip the king of Bohemia from the duchies of Austria, Styria and Carinthia and the margraviate of Carniola and the Windic March, because he gained those during the great interregnum not entirely legally; however that was a general policy concerning all dubiously seized lands during the great interregnum.
All the situations you describe there involve revocation of certain titles and honors, typically after a rebellion, not total disinheritance of a line through banishment following summary judgement. The closest you get is with Henry the Lion, who still kept his allodial lands in Brunswick-Luneburg. I feel as though my point still stands.