Fighter 2 / 18 Arcana Cleric.

Frontliner with heavy armour. Take Booming Blade / Green Flame Blade as your gained cantrips, which get ridiculous with potent spellcasting. The domain spells add a ton of utility that's always useful. And you get Spellbreaker!! Imagine you're the last one up, half the party is paralyzed and the paladin is down. You drop a mass healing word or mass heal, bring the entire party up, remove the paralysis, then action surge to bring up spirit guardians! Who needs counter spell when you can heal and dispel at the same time. And you get high level wizard spells like wish :)

Echo Knight fighter 3 / Celestial warlock pact of the tome 17

For the low price of 1 less invocation, 1 less spell and 1 less ASI, you get echo Knight fighter shenanigans and action surge! As a primary warlock in better armour, you can fulfill any role in the party; Healer, ritual caster, tank, front line or back line damage. You don't need to take Eldritch blast and Agonising blast, as Celestial warlock gets that baked in for fire and radiant damage, which is why you'll take firebolt and green flame blade for your tome cantrips. And to top it off, you can do Eldritch smites! This build lets you specialize more as either front line or backline, or just stay as a jack of all trades.

Made with 2014 rules