Re: A-1 and equivalents 1- This idiom doesn't carry the same meaning- it refers to a specific characteristic, the ability to remain calm under pressure, but it doesn't go further than that.
2 & 3- This aren't idioms, IMO, though they do have a similar meaning to A-1, but don't mean the best, just high quality.
4- This would be 'top-rung'. You wouldn't be top of the rung. 'Top-rung' is used to mean the best, but I haven't heard it used for people, but positions and for the qualities of things like systems, tasks, etc. |