I would suggest the Holy Roman Empire/the Germanies/Germany. Everything was awarded as afief, including offices (such as the Postlehen of the House of Thurn and Taxis), and it wasn't legally abolished until 1849 (and some of the Rittergut manors still existed until the Allies eliminated them in 1947). Originally it was an in persona enfeoffment, so the death of either party terminated the agreement and returned the land to the superior or the superior's heir. It gradually became hereditary, but subinfeudation was always common.
The German manor system was known as Villikationsverfassung (from the Latin villicus, an estate official appointed by the owner). There were also Rentengrundherrschaft, where the "manor" was just a collection point for rents from the farmers, so it wasn't totally pure, but I don't think there was a pure manorial system anywhere. They started to break up during the High Middle Ages when trade and urbanization increased, but as mentioned, some lasted until World War 2, and particularly during the Early Middle Ages, either France or Germany probably had the "purest" manorial system.
Scutage wasn't as developed as in England, though. Nobody developed it to the same level as England, whose monarchs used it as a supplement to taxation (likely due to their much smaller population). It was also short-lived, being first mentioned in 1100 and last used in the 1300s. Additionally, English scutage was demanded by the king; German scutage was a choice of the vassal.