Guild Wars 2

Hi everyone,
this has been asked a hundred times perhaps, but I also have to. ;-) My first character is a thief, which I pretty much enjoy but feel like a pure dps-class, that can only share support in a group in a very limited way (stealth and two combo-fields, very very little heal,…). I want to run a second char, now with heavy armor and simply can’t decide between warrior and guardian. To be honest, the high dps of a warrior are tempting, but it’s not everything I want from my new character. Perhaps I want too much (something like a jack-of-all-trades), but these are my requirements:

For PVE (dungeons) and WvW I want to:
1. make a decent amount of damage and be able to win a 1vs1-fight, perhaps even a 1vs2 damage-wise.
2. be strongly supportive for a group and not limited to dealing damage alone.

I heard of warrior-builds that heal and share boons through shouts and/or banners if traited. But generally I heard the guardians are higher capable of supporting while dealing less damage.

So what would you think, which class could be better in sharing both, high dps and strong support for a group (heal, boons)??

Any help would be great!

Think of it as this.
Out of 100%
Guardian dmg – 40%. Support – 60%
Warrior dmg – 60%. Support – 40%