I think Thelwell and Lampard are working together right now. But going for players from other leagues doesn't guarantee success either. It does come with its own risks but the price is usually lower. Players that have adapted to PL come without that risk, but the off-putting part is the price - which seems to be why we've only wanted certain players on loan (Winks, for example).
We have approached Lille for Onana and like the lad at Wolfsburg.
Look at 2019 window. We bought Kean and Gbamin from outside the PL, not including Gomes who was here already, and it didn't exactly work out. It shouldn't matter what league they play in, just if they're good enough and the right deal can be done.