Here are the most preferable Potter patriarchs.

Lyall Lupin

Yes, you may be surprised to see Lyall here, seeing as it was due to his unfortunate run-ins with Fenrir Greyback that Remus Lupin first became a werewolf. But this kind man, who married a Muggle, spent his entire life looking for a cure for his son – and loving him, despite his lycanthropic little problem that he inadvertently caused. Suffice to say, Lyall made a mistake getting on the wrong side of Fenrir, but never stopped seeking redemption.

Xenophilius Lovegood

His parenting techniques might have been somewhat ad hoc, but there is no denying that Xenophilius did all he could to be a good father to Luna. He raised her, mostly, alone, he guarded her from Wrackspurts, and even if he did bring paraphernalia into their home that could have blown them both apart, he didn’t mean to, and that’s the main thing. Betrayal of the Chosen One isn’t something we’d usually highlight as a laudable quality in a wizard (it’s actually largely frowned upon, except by certain Slytherins) but the depth of his devotion to his unusual daughter was highlighted in Deathly Hallows, where he orchestrated the near capture of Harry in a desperate attempt to save Luna.

‘It’s Potter, I tell you, it’s Potter!’ sobbed Xenophilius. ‘Please ... please ... give me Luna, just let me have Luna ...’ ‘You can have your little girl, Lovegood,’ said Selwyn, ‘if you get up those stairs and bring me down Harry Potter. But if this is a plot, if it’s a trick, if you’ve got an accomplice waiting up there to ambush us, we’ll see if we can spare a bit of your daughter for you to bury.’ Xenophilius gave a wail of fear and despair. There were scurryings and scrapings: Xenophilius was trying to get through the debris on the stairs.
Harry Potter and the Deathly Hallows

James Potter

James was deprived of his chance to be a proper father to Harry, dying at the hands of Voldemort as he attempted to defend his wife and infant son. The mere fact of his self-sacrifice would have been enough to get him on this list, but even after death he proved himself to be a devoted guardian to Harry. He appeared to him in the Mirror of Erised, the manifestation of Harry’s heart’s desire; he emerged from the tip of Voldemort’s wand and even as a shadow attempted to help his only offspring survive; and the Resurrection Stone brought him back for a final time, when he gave Harry the strength he needed to survive his last, terrible battle.

Even Harry would roll his eyes at the idea that James lived on in him – but it’s true, and we need only look to Snape’s unabated loathing as proof.

Amos Diggory

Never was there a prouder, or more annoying father than Amos Diggory. Cedric might have been humble, but Amos wasn’t afraid to sing out his praises, loud and proud. His haughty support of Cedric was his defining characteristic, shining through in every aggravating word, but your heart couldn’t help but break in the final chapters of Goblet of Fire, as he made his way through the crowd to the dead body of his son.

‘Ced’s talked about you, of course,’ said Amos Diggory. ‘Told us all about playing against you last year ... I said to him, I said – Ced, that’ll be something to tell your grandchildren, that will ... you beat Harry Potter!’ Harry couldn’t think of any reply to this, so he remained silent. Fred and George were both scowling again. Cedric looked slightly embarrassed. ‘Harry fell off his broom, Dad,’ he muttered. ‘I told you ... it was an accident ...’
‘Yes, but you didn’t fall off, did you?’ roared Amos genially, slapping his son on his back. ‘Always modest, our Ced, always the gentleman ... but the best man won, I’m sure Harry’d say the same, wouldn’t you, eh? One falls off his broom, one stays on, you don’t need to be a genius to tell which one’s the better flier!’
Harry Potter and the Goblet of Fire

Arthur Weasley

The best wizarding world dad we know of is the man who sired a whole flamed-haired brood, survived a snake attack, and loved Muggle-kind where other wizards loathed them. Step forward, Arthur Weasley.

Arthur might be a touch scatterbrained and a teeny bit Muggle-obsessed, but none of that ever stopped him from being the best father he could be. Leaving aside the fact he failed to notice that his sons had stolen his malfunctioning flying car, and were making things explode in their bedroom, Arthur spent his entire existence working hard for his family. It’s testament to his fantastic fathering that he managed to lend his likeness to no fewer than seven siblings – and that none of them turned out terrible.

…Well, Percy had his moments.

‘We have a very different idea of what disgraces the name of wizard, Malfoy,’ he said. ‘Clearly,’ said Mr Malfoy, his pale eyes straying to Mr and Mrs Granger, who were watching apprehensively. ‘The company you keep, Weasley ... and I thought your family could sink no lower –’ There was a thud of metal as Ginny’s cauldron went flying; Mr Weasley had thrown himself at Mr Malfoy, knocking him backwards into a bookshelf. Dozens of heavy spellbooks came thundering down on all their heads; there was a yell of ‘Get him, Dad!’ from Fred or George; Mrs Weasley was shrieking, ‘No, Arthur, no!’; the crowd stampeded backwards, knocking more shelves over; ‘Gentlemen, please – please!’ cried the assistant and then, louder than all, ‘Break it up, there, gents, break it up –’
Harry Potter and the Chamber of Secrets