Opposite of "most recently"

What is a good way to formulate the opposite of "most recently"? For example,

Display the five most recently updated streams.

The two most recently hired coders are doing a great job.

How do I better formulate these?

Display the five streams where the greatest amount of time has passed since they were last updated.

The two coders where the greatest amount of time has passed since they were hired are doing a great job.

Solution 1:

The opposite of most is least, so you could say:

Display the five least recently updated streams

The two least recently hired coders are doing a great job.

Solution 2:

For the second case, you could say most senior. As in, "The five most senior coders are doing a great job."

Solution 3:

Display the five stalest streams.