well i would advise probably warrock, but i have no idea wether its been dropped again. There are many games out there with a party system. For a guild system u could try eternal lands which is something like runescape but definately a much better play. And to say that FoM is a game that is definately worth playing. Its got a new type of gameplay system into it which makes it great with no levelling, and yes there is a moderate learning curve to it which u shud be able to master in no time.
The one warning about DDO is that you ONLY get XP at the end of quests, and quests can often take a couple hours. Once you get to mid level (5ish for now) you will be spending a minimum of 1/2 and hr per quest.
I lvoe the game, but had to give it up due to time constraints (RL, job, game, game got droped)