The above mentioned Koval, Bezus, Garmash, Yarmolenko and Khacheridi from Dynamo Kiyv. Also tempted to add Sergiy Sydorchuk and Sergiy Rybalka, who can both reach a high european level if they develop well.
Outside Dynamo Kiyv Olexiy Kurilov from Vorskla is probably among the best purchases you can make. Eugene Tkachuk from the same club looks like a very good investment. Artur Novotryasov from Sevastopol the same. Olexandr Osman becomes a very solid left back. Opanasenko has had potential in earlier versions of FM, but I don't have any experience with him on 14 due to Metalurg Zp's asking fee.
Konoplyanka and Roman Zozulya(who's had a huge stat bump on this version it looks like) from Dnipro.
Started a Dynamo Kiyv ukrainians only save today(in the spirit of current events), have gotten Kurilov, Tkachuk, Novotryasov and Zozulya thus far.