Depends a bit on the branch/focus of economics you're looking at, and which nation/region you want to read about, but a broadly uncontroversial list would be:

The Quarterly Journal of Economics, Oxford University Press (colloquial known as "the QUGE")

Econometrica, Econometric Society

Journal of Economic Literature, American Economic Association

Journal of Economic Growth, Springer

Journal of Financial Economics, Elsevier

Maybe swap in the Journal of Political Economy if you're looking for more political leaning research. Swap in the American Economic Review if you're interested in more American-centric research.