Agreed. I personally avoid controllers like the plaque in solo-q.

Difficult to carry the team as a controller even with 30+ kills.

Best to let someone else fill that role. Even if your team's controller feeds, his smokes are usually still useful to enable the rest of the team to take/hold a site.

Reyna, Kayo, Jett, or any decent initiator/duelist that you're comfortable with.

Sentinels are 50/50. Would still not recommend for solo-q.

Avoid picking controllers, you won't be able to convert your smokes/uti to kills if your teammates are pissing around doing jack all.