Which coins -- not coins in the top 10 -- do you think will come back and go past the prices they were at?
Its hard to predict, i suggest you looks for coincalendar, its a good refference than choosing worst deep coin in current market condition. but maybe enter to a few coins can be accepted, like :
TEN
ETH
ACDC
VEX
XLM
If you have seen the OP stated that the top 10 coins are not included, you may remove ETH in your list.
I had to choose this coin in market cap, Byteball, it is not deeply lowered price but hopefully, it will recover soon from the sharply reduced.
This coin has a good technology(IMO), and I believed on this that it might be bounced back price when bitcoin swinging the price into the normal. I am currently holding on this coin.