He literally won the championship last season.
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Marcelo Bielsa - Wikipedia
en.wikipedia.org
But... you're right that he hasn't got a glittering record of trophies. He hasn't managed a top-N team, either, though (i.e. a team in or around the top of their tier) other than Leeds, who he's done very well with.
I'd be interested in giving him a shot.
He has had shots a big-ish teams Lille, Lazio, Marseille but doesn't last because he can't work with people above him. He is a bad fit at bigger clubs because he is only willing to do things his way and is a prick to those above him.
I also think his style and the way his teams lose would be killer at a big club. At Leeds it doesn't matter because getting 10th is fine so giving up 4 goals because of defensive indifference is fine but doing that repeatedly for a team that wants to finish top 4 would not be the same.