The way I evaluate names as first names and middle names is completely different. Basically, for middles, anything goes as long as it is meaningful and flows well.
Hardy -- It's definitely useable as a first, though not at all my style.
Seaborn -- Not useable as a first. I just keep thinking "fish!".....even though I am totally in favor of having a water birth, this just seems weird.
Able -- I actually love this name! Totally useable.
Lemuel -- Useable, but not my style.
Worth -- No....sounds like he may *not* have been "worth it"
Erastus -- Not a fan.
Zebedee -- No. Reminds me of the critter land in Splash Mountain at Disneyland.
Bolton -- This one is interesting.