Jacob

Gen. 49:33: "Gathered unto his people." Does this mean that he died? Yes, but something more. If you read chapter 50, you will find that it was months before he was buried. It means that at the time of his death his spirit went into the unseen world and was gathered with his people who were there.
Isa. 14 is corroborated by Luke 16:23-31. We get both sides of hades. The rich man in the lowest part sees and recognizes Lazarus in the other and he could speak. Thought, memory, and intelligence are still there. Abraham also knows him and his state.
Matt. 8:11: The Lord means exactly what He says: "shall sit down with Abraham, and Isaac, and Jacob." It is most certain that they will know them. We do not expect to have less intelligence in heaven than we have here.
While we are here on the earth, we have five senses and are like one cooped up in a house with five windows. When we get to heaven, we will be free from all these limitations. We will have a body suited to that place, and the character of our knowledge there will be fashioned after the knowledge God has, not in degree but in kind.
Matt. 17:3, 4: Peter knows them because here he is brought in spirit into the atmosphere of heaven. We will have knowledge of this kind and will know and recognize all. There is no fear in heaven. In the full intelligence and joy of heaven we will be surrounded by the redeemed and their presence will be one of the contributing joys of that place. There is no doubt that the communion and affections formed here will be enjoyed and continued eternally there.
Luke 16:19-31: The Lord does not say this is a parable. He declares that there was a certain rich man and there was Lazarus. He was in hades (v. 23), not in hell, for the wicked do not go to hell now as the door of hell has not yet been opened. Scripture never says "a place of torture." There will be degrees of punishment: some receive few stripes, some many, as the righteous Judge decides. Torment is more a mental condition. The wicked dead are waiting for the Day of Judgment at the great white throne.
2 Cor. 1:13, 14: Paul will know them in that coming day and they shall know him. They shall have a portion in common in which they shall both rejoice. (See also 1 Thess. 2:19.)
There will be fullness of joy in heaven. Some may have large vessels and some small ones, but all will be full and unable to contain anything more.