What is an overview of Christian beliefs on the current state and location of Old Testament saints?

Where and how are the Old Testament saints right now? Here are some possibilities (not exhaustive by any means): - They are temporarily in a state of non-existence. - They do exist (where?), but are temporarily asleep/unconscious. - They are conscious in Heaven. - They are conscious in Sheol/Hades, enjoying (temporarily) the compartment for the righteous (see [Bosom of Abraham](https://en.wikipedia.org/wiki/Bosom_of_Abraham) and [Intermediate state](https://en.wikipedia.org/wiki/Intermediate_state)) . What is an **overview of Christian beliefs** on the current state and location of Old Testament saints? __________ Related questions: - https://christianity.stackexchange.com/q/89140/50422 - https://christianity.stackexchange.com/q/81207/50422