Under sail--Any of Perry's ships in the Lake campaigns.
A large scale 1/64 or 1/48 Cutter, and a Hoy would be outstanding--particularly in multimedia.
Perhaps some lumber schooners.
The ships of the fleet the other Perry took to Japan.
Some ships from ACW would not go amiss.
In powered ships, we deserve the ABCD line at a minimum.
Vessels from the Russo-Japanese war, perhaps?
Or, simply, a dropped hint to the manufacturers that many fleets have reused names across eras. Could get some sales by kitting up every HMS Victory; ro every HMS Indefatigable--get to ships like USS Texas, or USS Virginia, where there are 4 and 5 and 6 potential kits in the gross sense, and more across different eras (three separate boxings of BB-35, if a company were so inclined, come to mind).
We really could use some "4 pipers" too, which could lead to DMS and APD kits. How about some auxiliaries, too? We really have never had a proper Neosho.
Ok, and my personal bias--large scale modern small craft. ATC, Monitors, Fasts & Swifts; LCP, LCP(R), LCPL and LCP(L)... How about an LCM-7? A LARC.? An LCU. Some not-random-Lindberg-scales LCI/LCI(L), and LSU , LST. Now, I expect to see New Orleans or the new Anchorage out; but give us a LDS-1051, too, please.