/V2niz/

My all time favorite is the jagged alliance series, but it's a little dated (don't play the new ones). Jagged Alliance 2 is really nice and so is unfinished business. Jagged Alliance 1 and Jagged alliance: Deadly games are also very nice but they are old looking and if you are really into JA2 then it's worth the shot.

I also have played at lot of the civilization series, mostly II and III. Haven't had the time to go into IV and V yet, but it's a very solid TBS series.

Fallout 1, 2 and tactics are nice TBS (it's more of a turn based tactics game actually) games with heavy RPG elements.

More older games: Heroes of might and magic III (actually there might be others in the series, but this I can really recommend), Age of Wonders series, Silent Storm (have it in my backlog, but it's widely recommended),

Newer games:

Expeditions: Conquistador is a nice indie gem that I really enjoyed. The battle is somewhat limited, but the RPG elements make up for the shortcomings.

Hard West - actually helped to kickstart this and it has a really a nice story and polish. For me the battle is a bit limited again (then again I find the new xcom battle to be limited as well), but it is very solid.

Shadowrun Returns and Dragonfall - basically same description as the Hard West. The battle has more variety in terms of abilities and weapons though.

Dwarf run - made by one guy and it looks really dated, but it is actually pretty hard to play if you aren't a veteran TBS. Has less polish.

I can recommend a couple more, but the others are more of a ok experience - for example I enjoyed Blackguards series, but it's not as great as the others.

Disclaimer: It's somewhat wrong to recommend all of this titles under TBS, because strategy is the overall campaign plan and tactics is smaller game so a lot of this do not have strategy elements and only have turn based gameplay on a tactical level. But is quite common to pool them together under one genre.