Best champion Solo Q Climbing

Gangplank is strong if you're good with him, getting nerfed soon though :(

Depends on your elo, for lower elo Sion and Brand support are great for climbing. Especially because its rare to find a support main so if you know what you are doing you can have 5 people in their main roles. Sion support is still good for higher elo, but I'd say Warwick is even better right now.

Nasus isn't exactly 'good' for climbing elo, but Trist is okay and Xerath too, although you'll have to avoid some assassin matchups and/or learn how to do well against them.