As noted above we're gonna have election in April. I was looking around for voter preferences, I really have no idea these days where to find such, but came across picrel on this site:
https://partpreferencia.hu/

To sum it up:
Essentially 5 parties has any level of chance to get into the parliament. Reps can be elected directly from constituencies and through party lists but party lists has a 5% threshold. So as a "full" party only 3 has a real chance.
The variation in the result - some pollster predicts Fidesz others the Tisza will win confidently - is probably due to political bias. I've no idea which pollster is in the pocket of which party.
The parties that contest for the 199 seats:
Fidesz-KDNP - the ruling party, for 15 years, Orbán and co.
TISZA - the collector of opposition voters, led by Magyar Péter
DK - remnants of the old socialists, MSZP
Mi Hazánk - right radical opposition, the succession: MIÉP -> Jobbik -> Mi Hazánk
MKKP - the joke party, or as started such

So. Restricting it only for sure voters.
Fidesz might get 40-50%
Tisza might get 40-50%
Mi Hazánk will get in, but remains a small party