I personally loved Dragoon in 3.0. Since 4.0 not so much anymore but since they changed the amount of eyes required for LoTD to 3 i'm having i'm having a lot more fun again.

About which melee is the most noob friendly and has an easier time dealing with latency... i'd assume SAM being the best for you.
Then probably DRG or MNK.
NIN is prob the worst when it comes to dealing with latency.