If you think oil prices are headed higher (they have already moved up a good bit), the oil stocks might be of interest to you. Exxon Mobile yields a 7.43% dividend and Shell just increased its dividend, it's over 5%.
There are oil ETFs that leverage the market, GUSH and DRIP, the former for up and the latter for down price movements, and regular ETFs of course.
Top 7 Crude Oil ETFs - ETF Database (etfdb.com
Two large oil services companies of course are SLB and HAL.
2021 could be a decent year for oil, I think the long term outlook is less favorable for various obvious reasons. I own a bit of Shell and OXY, neither has done very well for me over time. Well, they are both well into the red on my investment.