I don't know about all the other currency denominations, though I don't give a damn much whose mug should be on the obverse, as long as they achieved something all political stripes can honour, and of course, they should be dead. But what I'd like to see on a circulating five dollar coin, if they ever get around to it, is a whole killer whale on the obverse, and a zoom-in of its dorsal fin on the reverse so we can call it what it is - a fin! not the laplanding kind - they already have Rudolph on our quarters! (and not the lap dancing kind < "sorry Charlie, we want tuna that tastes good!")
:?P