I count Luongo (EPL), Burgess (EPL), Gauci (EPL) Circati (Serie A), Irvine (Bundesliga), Metcalfe (Bundesliga), Irankunda (Bundesliga), Genreau (Ligue 1) who have a good chance of some game time. Volpato maybe too if he moves. Souttar also in the EPL next season but suspect he'll move on or not play
In youth set-ups/likely on loan from big 5 leagues included G. Kuol (EPL), Peupion (EPL), Robertson (EPL), Trefiletti (Serie A) Esposito (Serie A), Pavlesic (Bundesliga), Mohamed Toure (La Liga). I've probably missed a few here.
Players in other notable European leagues likely to include McGree, Yengi, Silvera, Glover, Elder and possibly Jack Iredale and Jones (all Championship) Ryan, Hrustic (both Eredivisie), O'Neill, Bos (both Jupiler Lig), Mabil, Laws, Chipperfield (all Swiss Super League).
A lot of players playing at good levels atm.