three x three (SPOILERS BELOW FOLD)
(google was my friend and can be yours which is cheating obv but i had not slept a wink)
(also this answer is unchecked and indeed widely contested BUT IT IS SO GREBT!)

pˆnk s lord sükråt cunctør in Do You See / FT • Film • 59,840 views • Share/Save

Yes, it does kind of work if you think of Return Of The Jedi as the first of an Ewok trilogy. Harry Potter: minor role but present in all three and of course there have been five Leprauchaun movies now.
Well done Mark S and Google.
also he is reepicheep in two narnia movies made out of three narnia books!
also i feel YOU were somehow robbed of this feat pete!
What? Oh, I get it. This is an expanded version of the original question, the answer to which is Bruce Spence.
Also Warwick is in three Narnia movies (well, on TV)! He is four x three!
Expanded version being a completely different question. He hasn’t even been in all three of any of the trilogies he’s been in.
Narnia is TV does not count (like being in three episodes of Dr Who ferchrissake).