League of Legends (LoL) Question: A good champion to get from Silver II to Gold 5

my personal favourite champs are
Top: Trynda,jax
Mid: Annie
Jungle: xin,jax
Adc: Never play it because i'm always 0/10
Support Zilean <3

It's better to just pick something you enjoy and feel strong with and then practice it a lot. Tier lists like H4xDefender's and LastShadows can be helpful, but ultimately your pick doesn't need to be strong in the meta for you to be successful.

I posted this earlier but I'm in promos for Silver I right now. I spam the **** out of Malzahar mid and Miss Fortune bot. If you really want to climb look up how to control lane phase. In ranked you want to play really easy champions that can carry and Malzahar's rework makes him point and click. I posted a guide for him if you want to look at it. Ahri is the safest mid laner right now, but you should pick and play who you're best at. Also, if you want to climb fast learn jungle. Good junglers normally win games. If not jungle play mid and top as those are the easiest roles to carry the game.

Mid : ryze, ahri .

Top: Darius, Renekton, Graves, Shen, Irelia, Jax (Jax is so ******* strong)
Jungle: Graves(super OP), Zac, Evelynn (makes you a better ganker and teaches you how to invade), Vi
Mid: Ahri, Xerath, Twisted Fate,
AD: Jinx(super broken passive and Q), Twitch, Jhin, Lucian, Vayne (go warlord's and 12 into the resolve tree. Don't play vayne if you don't do this its impossible)
Supp: Sona, Braum, Blitz (broken in soloq), Janna (if you don't know how to play, its ok because she is good if you are supping a hypercarry)

Fizz ( MID ) , Fiora ( TOP ) , Zac ( Jungle ) , Jinx ( ADC ) , Leona ( SUPP ) .

Altough tierlists aren't 100% correct on everything they do give a good idea of which champs are good rn. Never hurts to atleast check them.