Bishop, aka "senior pastor," "Teaching Elder, "Leader of the pack." (Oh wait, I think that last one is a song, but it's kind of like that.)
In my denom, they do the sermons mostly. For the bigger churches within the denomination some of them write books and do radio sermons. (Donald Barnhouse and James Montgomery Boice were two Teaching Elders/"bishops" from our mother church... again, if I had a church, but when I did Boice really was our Teaching Elder for a while. Go ahead and google the names. You might even recognize the names without googling.) The sermon was the main thing they did, but they also had to go to presbyteries. (The name of our denomination specifically because it means gathering, so it's also what we call meetings when the churches in the area come together to make bigger decisions, and what we call the national gathering every year.) They had a voice. They often chose not to use it until something was important enough to speak up about, because when they talked, everyone listened. The American legislature branch was created around the formed used in the presbytery meetings, except for one huge difference. Our Teaching Elders cannot vote! Only Ruling Elders, (aka deacons... sort of), can.
Now our Ruling Elders can give sermons too, but they have their own missions they run, plus come together on the needs of the building and the members of the church. They're also called on to teach Bible classes for the adults, (women or men teach Bible classes for the kids), as well as membership classes. (No one can join until they know what they're joining and agree to the basic principles. And it is the basic principles. Our denomination doesn't believe tongues are for today, yet hubby speaks in tongues. They don't have a problem with that, just as long as hubby knew not to speak tongues during service. Since he usually worships in tongues, he simply chose to worship out loud in English only. So, we have to agree to the basic principles, not the side issues.) And they counsel people, and do what is expected of all members -- volunteer for whatever missionary work they do. And, they do services at people's homes, if the people can't come to church.
Now, although Ruling Elders are kind of like deacons, technically they aren't deacons. Deacons tend to help the widows and orphans. (Our Ruling Elders do that too, but it's not their main focus.) There is controversy in my church. Not about deacons, but deaconess. Frankly, they don't think women should be deaconess. That one caused a divide with us and another branch of Presbys. That was our split.
But, by nature, I am a deaconess, and did the job of a deaconess with the knowledge of the Elders. (Actually I worked with one of those elders. lol) So, yo? Don't want to give me the title? Okay. Really not a problem as long as I can keep doing what God has me do.
(And, sure enough, not much later I became disabled, so can't do that anymore. I take that as a sign from God not to do that anymore. lol)
That's just to give you an idea of how my denomination settles these issues. As already stated, I'm still amazed how many other ways other folks handle these issues.