This is a very good question. The best option is cr.HP imo, but if properly spaced. If you spaced it right you get +frame advantage. I’m assuming you know frame advantage. Now depending on your opponent if you get a counter hit into bnb. They gonna get scared of attacking your cr.HP. Thats when you can start doing 50/50. But that all depends on what your opponent tendencies are. Also HP shooting peach is +frame with proper spacing.
Another one that I usually do is just walk up to opponent press s.LK, you have a bit of option here. You can throw afterwards, or you can LK, cr.LK for minor pressure or do a neutral jump into throw. Also if the LK hits you can go into target combo bnb. Also you use st.MK as its a decent normal doesn’t connect unless you counter hit. But if you are daring you can just walk up and walk back then jump, if he presses a button you’ll get a free jump in.
Charged HK, very dangerous but if you do it when your opponent is not ready for it you can get a 50/50 going or if it hits can link into target combo xx ex-peach/CA. I personally like to do this after air-to-air trades.
I really like to jump in, but only good if you do it at the right time. Usually the right time is when opponent is pressing buttons and can’t recover fast enough. Also when you pressure your opponent so much that he’ll focus on blocking but as long as his reaction is slow. There some more but that all depends on the opponent tendencies and how much risk you willing to take.
-cr.HP good if spaced, also very good with v-trigger. You can always v-trigger after block or hit. On block you can go into 50/50 or on hit you can go into big damage combo or a reset.
-walk up and lk/lp or bait, also didn’t mention f+mp(just the clap, not Irish whip) is good at the its furthest distance. It becomes a +frame.
-charge HK if you can do it at the right time(opponent is confused, whiffs, anti-air/air trades)
-and of course the unsafe jump in. But if you jump in and your opponent doesn’t know how to maximize damage/anti-air properly you should take the risk to jump in. As jump in is automatically a 50/50 setup.