i don think there is anyone safe, to be in the top 4 of olympic categories it is going to be very tough. Currently both are not in the top 4, actually far away from that.
I think the kvesic brothers are currently around ranking 20 when you add both categories together, same for hassani when you add two categories in female.
If we qualify one athlete in karate I would be already very happy.
but still long way to go, I think the ranking will change as so far some people were focusing on championship more than ranking.
Karate qualification period starts in July 2018
otherwise this year
road cycling and box freestyle qualification period starts in October and November. Although currently in road cycling does not look very good for us, probably only one quota. in Bmx freestyle will be very tough, as only 8 places and clear preference for nations with many competitors.
U21 Football team, qualification and European championship
basketball: qualification tournaments both men and women, probably both out
gymnastics: World Cup series starts in November 2018, world championship 2018 not relevant for us as we don't have a chance to qualify a team
judo qualification period starts in may
Sailing: world championship in August
Shooting : WCH in September
Taekwaondo: started already in 2016, the main events this year are:European President Cup and European Championship in April/May, and then the GrandPrix Series starting in June and Grand Slam in December. Those are the events where you can collect the most points for the ranking. Looking at the current olympic ranking we have one female (Kristina Tomic) in Top 5. Few others just below or very close to the top 5: Nikita Glasnovic, Matea Jelic Lovre Brecic and Toni Kanaet. Iva Rados and Vedran Golec still with some chances, maybe Bruna Vuletic.
Triathlon starts in May, but I don't think we have a chance
I did not take into account sports where we don't have a chance and where the qualification system is not published yet.