Here's my current setup on my Roam. I change parts all the time...not because anything is "uncomfortable"...I just like playing with different setups. A local bike shop recently went out of business and I bought these bar ends because...well...you can never have too many styles of bar ends, right? These were longer and straighter than some of my other ones, and the bar diameter is a 22.2mm MTB diameter (which isn't always the case with bar ends), which means things like this mirror will slide right in to the end.

So I've got the mirror "forward" of the bike and it's in a perfect position. I can just see around myself in it, and it doesn't really add any width to the bike. I can also fully wrap my hands around the end of the bar or place the flat of my hand across that corner without obstruction. It's also comfortable gripping it as I am in the photo, joystick style. I keep looking for a button at the end to kick in the electric motor...but I guess I'd have to have a button for that to work...and a motor!

I haven't yet wrapped these bar ends, or put foam wraps on them. Maybe I will soon if I decide to keep this configuration for a while.