There are some great answers here, with different opinions. There is no one "right" answer. The main thing is that you need to be comfortable with your risk level.

Fidelity does their research to put together good options. Your employer selects what they think are good options to make available to you. It is designed to make money, but we can't know what the market is going to do.

My "advice" would be to keep it simple so that you understand it and are comfortable. With 20 years to go, I would dump it all into an SP500 index, but that's me. You'd have some highs and some lows. You'd need to be comfortable with that.

Standard advice would be a fairly aggressive split between stocks and bonds, based on your age/time to retirement. You could follow that on your own, or Target date funds will do that for you. Put it all into a target date fund and forget it.

It sounds like your dad knew all the right answers and made his own choices. I can't really comment on his situation because he may have mismanaged his money, he may have followed his plan to the letter, he may have made less than you believed and this is just the reality.

It sounds like you also have the knowledge to make and follow a plan. I would not be looking at turning it over to Ed Jones. They can give you a plan (just like you have today and just like your dad had) and what you do with it is up to you. <pay us for the service please>.

To add my two cents to your great explanation, at age 28, I'd be 100% in equities with 0% bonds and treasuries. But to each his own. OP took an aggressive approach and appears comfortable with the risk.

Maybe both of us are reading Freddy's comment wrong, but I agree, this is diverse in what I would consider to be an appropriate way.