Is the idea of soul sleep for would-be saints Biblical?

The Bible shows that Mary is in Heaven as the Ark of the Covenant (Rev 11:19), while the martyrs are crying out to God for vengeance under the altar (Rev 6:9) and the prayers of the saints are being offered as incense (Rev 8:4). So Mary and the saints are in Heaven, but what about **would-be saints**, i.e. people who haven't been perfected in this life? Do they experience sleep, meaning that they die, sleep, and wake up *all together* to the [final judgement](https://en.wikipedia.org/wiki/Last_Judgment) ? Or are they judged *individually* before the final judgement? I would appreciate answers from different view points as long as it can be deduced from Scripture: Catholic (purgatorial), Eastern / Oriental Orthodox, and Protestant (non-purgatorial).