Been using claws-mail for a while. Never had any problems with it.
It's light on depends if you already have gtk2 installed.
https://www.claws-mail.org
Depends On: gtk2 gnutls startup-notification enchant gpgme libetpan
compface libsm dbus-glib hicolor-icon-theme desktop-file-utils
Total Installed Size: 19.17 MiB

It's based on sylpheed
https://sylpheed.sraoss.jp
Depends On: compface gpgme gtkspell libnsl
Total Installed Size: 7.45 MiB

Compared with thunderbird
https://www.mozilla.org/thunderbird/
Depends On: gtk3 mozilla-common libxt startup-notification mime-types
dbus-glib alsa-lib nss hunspell sqlite ttf-font icu
Total Installed Size: 156.55 MiB

Compared with evolution
https://wiki.gnome.org/Apps/Evolution
Depends On: gnome-desktop evolution-data-server libcanberra libpst
libytnef dconf gspell libcryptui gnome-autoar
Total Installed Size: 279.37 MiB

Compared with mutt
http://www.mutt.org/
Depends On: gpgme ncurses openssl libsasl gdbm libidn2 mime-types krb5
Total Installed Size: 8.06 MiB

It doesn't have any problem with gmail.

I have used Thunderbird for several years now and it meets all of my needs, is fairly easy to learn, fairly easy to use, and has not had issues.

I might as well go back to Sylpheed now, since the only reason I switched to Icedove/Thunderbird was for enigmail.

There's still Icecrypt for Iceweasel-UXP in the Hyperbola reps, which I'm finally back to using as a daily driver, so I'm just complaining.

Agreed: the list of dependencies, and their size, is horrid.
However, many of them are the always same gnome dependencies that come with every gnome3 app; at some point I just decided to bite the bullet and make amends towards that.

Whoa:

My favorite wasn't on the list: mu4e

You mean...

"Gmail.. we see every email in every inbox anywhere!"?

(Your mail is not your own..)

thunderbird

Thunderbird first, Evolution second.

Thunderbird

Thunderbird - ease of use, easy to learn, integrates well with other emails, still updates regularly