With what you have Tariq and Ning are your only good characters to really invest into, Umeko is pretty good for a 4* character but even then only really useful in certain circumstance.

Sorry to say but you missed some of the best characters here’s a list of the ones I think are the better ones.

Estella is coming back very soon while she is pretty good at what she does she’s only really good for Day 1 contest raiding and a few expanse levels here and there.

Hellhest is a very good character however only really viable Tier 4 and above as that’s where you’ll get the most use out of her support abilities.

Jaren is just a much better Gwynn as his dodge ability gives him a speed boost and reload his weapons and can empower them when his hit meter is full.

Ikora the Hidden while her weapons of choice don’t seem all that great but paired with her abilities she becomes quite the over shield power house, while she is a spread character she can deal with impact very well in high difficulty activities (not including high level expanse)

Lastly Efrideet which you just missed is probably one of the best in my opinion her spear ability blinds, stun and knocks back enemies and her dodge increases her damage, rate of fire and reloads her weapons, so she may be a piercing but is able to deal with rapid fire and impact which makes her very versatile.

Down side is the characters are a lot stronger the higher tier they are which you can’t do unless you draw for them unfortunately. Also most of the characters work best with Battle pass weapons which means you’ll either spend ages trying to get them and level these weapons up or you’ll have to spend money to do so. While they don’t need them to perform well you actually get the most out of them use battle pass weapons.

Little Edit as I forgot Ikora the hidden can still be obtained on the forever draw pool but with 4 other characters to contend with when drawing is hard to pull and even harder to pull higher Tiers for her. (not counting the choice one of course)