Exxon Stock....buy,hold, or sell

As an operator of exxon stores, I'm a big fan of exxon. I've owned exxon stock since I was 16 and it's performed admirably in the last 20 years, but the last few years have been pretty stagnant to unspectacular in relation to the entire market and honestly in relation to other BIG OIL like Chevron.

Exxon seems to have a bright future as the largest NG producer and the fact we're one crisis away from energy price spikes, so I ask some of you engineers and people in the field, what's up with exxon these days? Is it a buy, hold or sell

Compared to other oil giants

CVX has a 3% yield
Shell has a 5%+ yield
Conoco has 4.4% yield
Sinopec has a 4% yield
Total has a 6% yield
BP has a 4%+ yield

So at the level's exxon trade at presently with a 2.5% yield, that does grow which is is nice......do you buy it or one of the others. For the record, I hold CVX,RDS.B,COP, and SNP already just looking at Exxon and contemplating what to do with my shares and potentially future buys.

for the record, Im not a trader, I accumulate shares and will hopefully live off dividends in 30 years in retirement, so my timeframe is forever, just questioning exxon after the last few years.....and over the next three decades Exxon projects that global energy demand will increase by 35% as the global population grows to 9 billion, with most of the demand coming from developing nations such as India and Africa.

Thanks