Combination/ensemble forecasts
Source: Hyndman and Athanasopoulos (2021)
Forecast accuracy can be improved by using several different methods on the same time series, and averaging the resulting forecasts.
Using a simple mean is often best.
References
Hyndman, Rob., and George. Athanasopoulos. 2021. “Some Practical Forecasting Issues.” Chap. 9 in Forecasting Principles and Practice, 13th ed. OTexts. https://otexts.com/fpp3/practical.html.