Forecasting Minute Level Data

What time series techniques/methods has anyone used here to successfully forecast minute level data? We’ve tested out several common time series models (ARIMA, SARIMA, exponential smoothing, Prophet) with little success and are now testing LSTM models and having a bit more success. Any pieces of advice/insight are much appreciated!

P.S. We have to forecast at the minute level. No aggregating to hourly, daily, etc. unfortunately.

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